CTF and Control Points are possible. I guess it would be a good idea to add them, so I will include them into my planned features list.
I think you may be right about FFA and Teams being kinda boring, but still I will keep multiplayer in priority, since it is halfway done and I can't compile an update without finishing that. I should have planned things better, but multiplayer has been often requested before so it was about time to roll it out.
Thanks for the suggestions though, they are honestly very helpful!