Guncrasher,
Since AH2 went live, the following units have been added that are either even in weight between scenarios and the MA or mainly for the MA:
B-24J
P-47M
P-47N
Ki-84
Sherman VC 'Firefly'
T-34/85
Wirbelwind
The most recent addition, the P-47M, has almost no scenario use and is almost exclusively an MA unit.
As to your comments about the A-20 vs A-26. Lets look at some numbers:
(using wikipedia as a quick and dirty source for the A-26B)
Weight, empty:
A-20G: 16,610lbs
A-26B: 22,850lbs
Weight, maximum:
A-20G: 26,000lbs
A-26B: 35,000lbs
Wing area:
A-20G: 465sq.ft
A-26B: 540sq.ft
Wing loading, empty:
A-20G: 35.72lbs.sq.ft
A-26B: 42.31lbs.sq.ft
A-20G is 6.59lbs.sq.ft better
Wing loading, maximum:
A-20G: 55.91lbs.sq.ft
A-26B: 64.81lbs.sq.ft
A-20G is 8.9lbs.sq.ft better
Power:
A-20G: 1,650hpx2: 3,300hp
A-26B: 2,000hpx2: 4,000hp
Powerloading, empty:
A-20G: 5.03lb.hp
A-26B: 5.71lb.hp
A-20G is 0.68lb.hp better
Powerloading, maximum:
A-20G: 7.88lb.hp
A-26B: 8.75lb.hp
A-20G is 0.87lb.hp better
Speed:
A-20G: 338mph at 12,000ft.
A-26B: 355mph at unknown.
A-26B is 17mph faster
Deck speed:
A-20G: 316mph
A-26B: unknown, but due to lower ceiling I'd guess it has a larger speed advantage here than at best alt.
A-26B is likely to be ~25mph faster
The A-26B is faster and carries more armament, but it is unlikely to be nearly as nice to handle as the A-20G. It certainly is not massively better performancewise as some posters here seem to think it was. Looking at the wingloading and powerloading I would not expect it to out climb the A-20G either.
It may have been awesome in Airwarrior, but that does not seem to be an accurate representation of its capabilities.
Addendum:
The A-26B won't do anything the Bf110G-2 doesn't already do. If you want an aircraft to do what you describe, bombing and then providing a cap, take a N1K2-J, Bf110G-2, P-38L or Mosquito Mk VI.