Please comment to help me add more interesting answers or make them more precise!
Try not to bet if you've seen the leaks (though no one can stop you)
@ArkSuna If the people Viktor "healed" are dead after events of ep. 6, this should resolve yes right?
I would disagree with resolving "noticeable timeskip between acts" to YES. Episode 4 started with a montage where some time passed but I don't see any reason to believe that a noticeable amount of time passed between the ending of episode 3 and the beginning of episode 4.
@AxelAhlqvist in episode 5 at 05:53 Caitlyn says: "Months of peacekeeping occupation.
Countless operations. Oceans of sweat and tears" which is more than enough reason to believe months have passed since Act 1
Ekko's prolonged absence was in fact so noticeable by the Firelights that he was painted on the mural (on which mostly dead people are painted) shown in episode 4 at 18:49. Jinx became a symbol and is nowhere to be found for many Zaunites to get angry and so on
For more discussion on how the time between Acts 1 and 2 affected the characters see: https://www.reddit.com/r/arcane/comments/1gtrolp/lore_spoilers_arcane_is_a_great_example_of_why/