1) Can you estimate how many players do we have now? Is this number growing after last updates? If number of players will be higher, then addition of a new map will be better option than increasing number of rooms (it will make the game more attractive for sure).

2) I think we can figure this out :)

3) Arctic/polar desert may work as well. Also, you can always switch the map theme according to seasons - arctic in winter and sandy in summer.

Redesigning of actual tiles and designing of required new ones can take me a couple months anyway (since my free time is also a bit limited), so there is no hurry in anything. Thus, we may consider everything later.

inkscape+gimp

"reach the score of 5000" will be more reliable :D

Bug no.6 is mostly gone, however, one still can be pushed by others :(

This suggests that problem lies within the amount of data exchanged between server and player. What if you will increase compression on sprites a bit more?

7.The dash slingshot effect - dash + roll combo causes one to fly really fast through the map

So as I understand this correctly - each character is animated separately, and for each part of it (body, head, weapon, shield), the engine gets the right spritesheet from a certain set of graphic files?

Dash + block could be a good shield bash move! Animation is ready, just make this combo to deal 1 dmg or something like that.