Is that zoom in/zoom out effect on pictures in chat also new?

Yes

#new multiple reactions upto 3 by same person

Nothing has changed?
I still can react to group's messages w/o being in the group

Maybe because you are restricted from sending messages here

Or maybe because all reactions are disabled in the chat

The feature you are looking for, IMe have added it on their new update now you can do anything like promote, ban, check user messages etc…. Via Chat list

#new emoji status

#new Report Reaction

how was it before?

Just a small icon

#new animation