Hi, let me first introduce myself, I'm known as Sinnicall in this vast internet world, currently studying Computer Engineering and Videogame development at college/uni, I came across this game searching over the internet, since I made a very similar one as a class project, so I'd like to leave some suggestions that I haven't come across so far and that might fix some problems for you as developers.

Firstly, I read that you guys are planning on upgrading your unity license. Through my entire knowledge and experience with multiple engines, despite unity being pretty much the easiest to use, it's also a great amount of money to upgrade. You might wanna consider using some other engine, there are many free engines out there which even have better resources than unity. (I'd like to sugest UDK aka Unreal Engine 4 as it did work quite well for my game). Maybe this will cost with the costs, unfortunately I can't give any suggestions or tips over online servers, cause as you well know and have mention, they are actually really expensive, and even more expensive for the mean you guys want to.

As for gameplay, if it does turn into an MMORPG, I think it'd be cool if you learned the seals per levels right? might just be a silly suggestion . Also you might wanna have some kind of aim lock onto objectives? As far as I'm aware, games in which is stupidly hard to reach your oponents due to dodgy cameras, tend to lose popularity quite fastly (...ehem down went chivalry).

Anyhow, that was all I have to say, thanks for your attention, and I hope i can be of any help anything you might need or want of me, don't doubt contacting me.