Slower flying would be awesome for me, it would allow me to actually kill people on the ground, not just get a hitmarker on them.
Slower prop planes and bombers were so damn good in BF1942. No lock on missiles or anything, just dropping bombs and rockets or getting in the gunner bubbles on the big bombers. Its always bugged me how goofy jets seem in modern BF games going either way too fast on maps or feeling too sluggish and making them feel cut off from the action on the ground. Slower air forces makes them able to get more involved on the ground and no lock on surface to air missiles makes ground forces attacking air forces a little more engaging.
Single most important factor in this game for me is the destruction. Battlefront was a gigantic back-step in that regard and is a large reason why that is so unsatisfying to play with the little pea-shooter laser guns.
If they've pared back the destruction again in this or as much as they did in BF then I have totally lost faith in them. When you have vehicles especially, destructible environments enhances that aspect of gameplay immeasurably.
Yeah, especially with something like WWI or WWII, I would absolutely love a game to really amp up the environmental destruction. Not just BF4 style scripted environmental sequences where you have one thing change but just deformable terrain and buildings that get ripped up over time as artillery keeps beating up the battlefield.
I just think of playing Company of Heroes matches where you have tons of artillery and the terrain just turns into a moonscape of craters and destruction and how cool that could be if you did something like that in a Battlefield game. And a WWI setting would be perfect for that sort of thing.
It would appear to be a hint at multiple time periods.
Ehh.... If they're going to go WWI or WWII, I hope they keep it relatively grounded within that time period. So even if they have big steampunk looking mechs, they're not zipping around the battlefield. Just keep the gameplay feeling different from modern day BF3 and BF4.