I think this game need a main story around Phoenix industries in addition to quests.
Secondly , I think the game need more construction slot in order to progress faster because the construction time is really excessive.
Also , the price of units from the marines is rather high so I got an idea : the goal is to reduce the price of the units when players buy a lot of them.
Furthermore , the units we pay with diamonds are really strong and should be unlock only for suitable player levels. For my part , I find it unfortunate that they aren't available for all and no just for those who pay.
Moreover , the game would need an " editor " for the base in order to organise it.
I don't speak very well English so I hope you understand me and what I hope to see in the game.
Excuse me if one of these subjects has already been treated.
Please accept my warmest regards.