1. First time hear about such problem. You sure that your keyboard is working correctly? Maybe create topic in forum and will see if more players has this problem.
2. Most of maps are too small for 12 players. And your suggestion about shorter respawn times will make problem with spawns even more noticeable. You can always create room for less than 8 players and problem with spawns will almost disappear.
3. Yes, i plan to add fast re-spawns. Maybe even in next update. Most likely at first fast respawns will be only in Hardcore preset.
4. In what games have you seen "gamemode voting"?
5. I'm just not a fan of mini-maps. In some games mini-maps give so much info that it's pretty much like wall-hack. I think players should rely on what they see and hear, instead of getting info about enemy positions from mini-map.
I am thinking about adding mini-map in Normal preset, but it's not priority.
6. It can wait. Not important at this moment.
Any game gets boring. Bigger studios has resource to release new content every few months, but i am still working on core of the game, so i don't have time on other things. But we have map editor, so community can make new maps. More weapons will be added later.