To my mind anything WW2 is just another drop in the ocean. WW2 is heavily covered by other games, but I don't know of any mainstream tabletop game that covers modern platoon-level combat. I'm sure there are rulesets out there if you're a niche gamer, but Battlefield Evolution could reach the same level as Flames of War with the right marketing and a decent model line. It's never going to be anything other than a niche product itself if it's just a ruleset.
Victory at Sea shows the quality of models MGP can produce today. So take that quality and apply it to a complete range of BF Evo models, designed for this ruleset, so there are no superfluous figures in the packs. No need for artillery models, for instance, so no need to make mortar teams or artillery vehicles, gun crews, etc. We need decent single-pose figures for the major armies covered in the game, plus vehicles in scale with them. British Army would need a rifleman, rifle/grenade launcher, Minimi gunner, LSW sharpshooter, and a rifleman carrying a LAW over his shoulder to make the basic section. Then you'd need two-man sniper team models, two-man GPMG SF role team, Javelin missile team, and whatever the man-packed SAM we use these days is. On top of that you need platoon-level command figures, so a lieutenant, platoon sergeant, signaller and possibly a medic. After that it's just vehicles - Warrior, WMIK Land Rover, Scimitar, Challenger 2, etc. For aircraft, just do helicopters, leave the fast-movers as off-table rules along with artillery. Lynx, Chinook, Apache, Sea King, Merlin, couple of other helicopters could be done eventually. Lynx and Apache would probably be the main ones to start as these are armed. Chinook could be important for airborne assault missions.
It'd be a big range, but that's largely the point. A good range of models is what brings in players. It's how FoW and 40K keep people coming back. New releases get people excited about the game. Doing BF Evo without a miniatures range is just a half-hearted effort, never going to bring in serious revenue.