These are my suggestions for zombie army 4 and sniper elite 5.
It would be great if they could give us a first person mode. Arma 3 mods and Red orchestra 2 heroes of stalingrad properly introduced iron sight and scope sight adjustment for elevation.
Watch video 5:00-onward they show sight adjustment.
I would like the option to choose an iron sighted rifle over a scoped rifle. Make it an achievement to snipe the whole campaign with ironsights. Call it the simo haya or white death challenge.
Allows us to trade our secondary smgs so we can carry two rifles instead. Or allow us to carry LMGs like mg42, bar, bren.
Character customization which will allow us to pick our uniform. Whether it be allied or axis. If your behind enemy lines might want to disguise as axis. Carrying capacity could be affected by your choice of web gear. Allow player to choose axis or allied web gear load out.
Make sure enemy AI has historically correct battle gear like they did in sniper elite v2, SE3. Most troops in v4 were missing regulation combat gear.
Bring in explosive rounds to the game. On the eastern front both sides used explosive anti air rounds for sniping.
See videos below
Keep maps huge like you did in many of the missions in SE4.
Otherwise looking forward to next installment.