First off, let me preface that poker may not be the highest priority in development, however, I believe there are some changes that can be implemented when there is time to do so.
1. A rake system and jackpot system-
Essentially, it would be like a real casino has rake-back and jackpots for their poker tables. Obviously, the numbers would have to be fair, tested and agreed upon by the majority of players and developers. This idea would need specifics, but I think it is a good thing to implement.
2. New interface with poker
The current interface honestly sucks. It's hard to tell how much someone bet or raise, or even if they bet or raise without looking thru the little chat screen. It's hard to where the action is, and sometimes the action is messed up and goes out of order. Overall, there are many UI changes that can make poker a lot better...even blackjack looks way better than poker.
3. Dedicated poker tables
Instead of needing a host for tables, have dedicated tables with dedicated limits that automatically start when 2+ people join. Saves time when the host is afk or forgets to start the next hand. Also, introduce a kick system by vote instead of having one person in charge of that. This would decrease kick and mugs which are frowned upon anyways.
These are what I have thought of for now, if you have any other comments, suggestions or questions just let me know!