Kev101 is one of the veterans on the EpicUK scene and was pretty successful (13-11-11 W/L/D) running the following list
TACTICAL [400]
6 Tactical units plus Transport, Hunter, Razorback LAS
TACTICAL [375]
6 Tactical units plus Transport, Hunter
DEVASTATOR [275]
4 Devastator Units plus Transport, Razorback LAS
SCOUT [175]
4 Scouts plus Transport, Razorback LAS
SCOUT [175]
4 Scouts plus Transport, Razorback LAS
SCOUT [150]
4 Scouts plus Transport
LAND SPEEDER [200]
5 Land Speeder
TERMINATOR [350]
4 Terminator units
THUNDERHAWK [200]
1 Thunderhawk gunship
WARHOUND TITAN [275]
1 Warhound Titan
WARHOUND TITAN [275]
1 Warhound Titan
THUNDERBOLTS [150]
2 Thunderbolt Fighters
although it does include terminators and a thunderhawk, I think you'd be hard-pressed to call it an 'air assault' list...
While it would be nice for the codex list to have a wider variety of builds, I do think that from a fluff POV and the way the list was designed, the 'surgical strike' aspect using air and drop assets should be the optimal build for the list, in the same way that an ork shooting list or an eldar attrition list
could be made, but would be sub-optimal....
and whether people would prefer a master list with more options over multiple lists, each with a different flavour, is a bit of a moot point.... unfortunately we're too far down the rabbit hole at this stage and we're kinda stuck with it
I do tend to agree with Ginger that having the codex list, steel legion, ghaz orks etc as fixed-in-time yardsticks for playtesting is important to at least attempt to reign-in power creep in newer lists, so while it would certainly be easier to tweak a single list, you'd be giving up a pretty important playtest resource in the process....
ps. Welcome back to the forum Ortron