Urban Rivals, in it's current state, has made some good choices and bad choices (I'd say the bad choices are more see-able and overshadow the good choices)
I will tell you this...
-Levels don't matter
-ELO is unbalanced
-Urban Rivals population has not changed in size, at least in a good way.
-Deathmatch is a completely useless mode now. (Used to be the room you would mission now)
Just to point out some of the bad things about UR. What would you change about UR to make it a game that could keep new and upcoming players while keeping older players happy?
Ultra-rare version of cards - "foils" - delivered mainly as prizes from game modes.
Differences to normal cards are these:
1) Kate buys them at flat minimum of 10k per piece making them always worth minimum of 10k
2) On "equal attack and equal level the one who goes in first" rule is changed so that "on equal attack and equal level foil wins, if both have foil then one who goes in first wins" - giving foil cards slight extra edge on playfield.
Chance of any card given from packs has 1:100 chance of being foil.
Card from Duel mode has 1:1500 chance of being foil
Card from ELO/DT prizes has 1:25 chance of being foil
Card from Coliseum has 1:50 chance of being foil
More specific options for the deck format creator. Making card/s mandatory for the deck, making it so there's at least X of rarity Y, if possible split the "Your Deck can only contain the following X type(s) of Ability/Bonus:" rule to abilities and bonuses separately, add Legendaries as a rarity. The small things that were overlooked/changed since the tool was created.