-Balloons I do like the balloons system on ROF, but it should have more defensive fire near ground.
I do hope we'll have balloons (I like how they can act as early radar), but it may only come in a later volume of Flying Circus.
The placement of defensive fire around them is really up to the mission builder.
-Getting a kill on MP
I think the score process could be reviwed, I see some problems in the one we have now in ROF.
First I do believe if the pilot don't land at an friendly airfield should be considerated as downed and if some enemy hit any bullet on him should be credited as a kill. (perhaps it should be an parameter setting to be actived by MP server admin)
Second, I don't like the last bullet hit is the one that takes the kill and the nasty behaviour it produces in MP enviroment. I do believe the guy who hit the higest amount of bullet hit should be considered for the credit. (same idea of shared kills can be considered as well)severely damage and make it to home alive... no kill should be granted.
The scoring wil likely be identical to BoX.
I don't necessarily agree that you should land at a friendly airfield to be credited a kill. You should definitely land on your own side (and survive the landing), but the Streak mechanic already acts like that. BoX also only awards 50% of the score if you make an emergency landing anywhere on your side, rather than a proper landing at an airfield. 0% if you crash.
As for the last bullet, well, it's either that or you'll have people putting a few bullets into as many planes as they can, hoping they eventually get a kill for one of them. It will displace the problem, not solve it, and cause frustration with the pilots who do stay on a single target. Target crowding and shoulder shooting is definitely bad form and should be bannable (up to a certain degree), but enforcing this lies in the hands of server admins.
-Defensive machine guns on the deck.
At lower altitudes on enemy side land, I think we should have lot of active fire from the ground, like MGs shooting. it should be very unaffective and rarely gives any damage to the aircraft, but its primary function is to give the enemy position to the defensive aircraft on patrol... higer altitude... more safe it should be.
Good idea, but again entirely up to the mission builder and maximum number of objects on the map.
-Scorting a bomber/recon AI
A kind of mission where pilots can act as a scort to 2seaters and get points if it makes back home.
If we eventually get a few recon two-seaters like the DFW and RE8, then I'm all for it. Again it's up to mission builders, mostly.
-player disconectionIf any player get booted from the game for any reason, his plane should be consider as an AI and still flying (performing emergency land? keeping on patrol in the area? going immediatly to home?) even going down is better than the plane just disapear after been pursuited half map along.
I like this idea, but I don't think it's technically viable. Spawning in AI is also very taxing on servers.
At least if you've put a few bullets into him, and he disconnects, then you should be credited the kill. It's the so-called rage(quit)kill.
If the mission had a side winner, all the pilots should get a bonuses over their overal score by own achievments and flying time.
This is my personal opinion, but I stopped caring about score when the RoF leaderboards went down (sometime around 1789) and I haven't cared about them since. Score is important during a mission, but carrying your history over with you is pretty much pointless, especially when you consider how easy it is to set up your own passworded dedicated server and grind yourself to the top by farming AI and ground targets all day long.
Some stats like gunnery and flight time are interesting to keep track of for your personal development, and even building up a streak can be fun and challenging, but measuring a pilot's ability in one single number really just turns the game into a pissing contest (and I'm using the less offensive term here).