I come bearing real spoilers from the reliable Brazilian PLL page. They also confirmed previously that the Reddit spoilers are indeed fake. The questions are in bold.
What did you think of the episode? It’s very good. It’s going to be an unusual episode for PLL standards. It’s a lot like 4x24. It’s like you won’t be able to catch your breath in time for the next answer (note: "reposta" means reply but they probably mean more of a revelation or event). They’re going to throw everything at you at once, finally.
Marlene said all the mysteries will be solved, is this correct? No. We’re far off from getting all the questions answered. Not even 50% of the questions from our list (from
http://www.theathing.com/p/questoesd...ttleliars.html) will be answered. For that reason, it would be a good idea to lower your expectations since everyone thinks everything will be answered and all the story gaps (holes) will be filled.
Is Charles the only reveal? No! Charles is the cherry on the cake. We will have answers to questions which came up before we even knew about Charles. We would love to list everything that will be answered but they’re protecting it so it can be a surprise. I’ll only say that you can expect the A team in force in the episode. ("em peso" has a lot of uses but this seems the most contextually correct, you can check this list here to see if there's something more fitting.)
Will there be many flashbacks? There will be many flashbacks. I didn’t count but there will be more flashbacks in this episode than in 4x24. Like I said before, you won’t have time to catch your breath.
What’s an important place in 6x10/Is there an important place in 6x10? Radley.
Of the four girls, who first discovers Charles’ identity? None of the four girls. [***It's already confirmed it's Alison who discovers A.***]
Will they talk about the night of the barn again? Yes.
Did anything surprise you in this episode/mention something that surprised you in this episode? Someone has an important link to the story and a flashback. The person only appeared in 2-3 episodes.
Will there be trolling? It wouldn’t be PLL if there wasn’t trolling.
Something you disliked in the episode/Anything you disliked in the episode? I didn’t like how they concluded an important character’s story. I don’t know if it’ll be the last time this character appears since I only know what happens in 6x10, but I didn’t like what’s going to happen to him/her.
Something to do with Mona? (note: this may be related back to the last question, idk, like "Is the thing you disliked something to do with Mona", it's kinda random and open ended, but in a back and forth convo, this question following the last question would make sense) Yes.
Is Charles going to tell the story to the four liars? No.
What did you like most about the episode? This is not really about the episode itself, but I really liked the choices the writers made to answer the mysteries. Do not expect surprising answers for everything. One or two responses are what people already imagined. And ultimately, that made me happy since it’s better they chose something predictable but logical rather than using unexpected characters who in the end make no sense.
Were there any funny or noteworthy scenes? Not necessarily funny but keep an eye on Emily. She’s going to do something that will leave 90% of PLL watchers satisfied.
Are they going to explain –A’s motives? Yes.
Will any old storyline be brought up? Yes! A storyline that everyone was annoyed by, dismissed as unimportant and ultimately forgotten with the progression of the story will be brought back up.
We were asked a lot about the future of some of the couples in the series. We can’t say anything about the couples since 99% of the time, spoilers concerning couples cause excessive turmoil. Sometimes giving out spoilers concerning couples cause more turmoil than if we told you who is Charles, so wait for the episode to air before you get pissed at Marlene, but probably some shippers will be frustrated.
Did you like who Charles is? Do you think it will please everyone? I liked it [who Charles is] and I think the majority of people will also like it. I searched theories concerning Charles right after finding out who it was to see if any fan guessed correctly. I saw some commentaries from a forum saying they wouldn’t like it if it was that person. So I think people will be a little conflicted.
Between the answers which will air, which was your favourite? Definitely the answer concerning a famous mystery from the 2nd season. Hint: a scene that became a classic in Season 2 which we ALWAYS talk about in 90% of our theories.
Where will the Charles revelation occur? I already responded to that one.
If the collapse thing above doesn't work, just PM me and I'll send the list to you.
Like you can't come back from that.
They're playing us 
Spoilers