There would be few 109G-2's by 1944 - have as an optional plane for one G-6 squad (Jg 26).
There would be a mix of190A-5 and A-8's in early 1944.
The Bf 109G-6 A/S also entered service in early '44 - should be represented by the 109 G-14 in equal(and low) numbers as the P-51 for balance purposes.
The A-5s could fill a bit of a gap, especially since our A-8 has 250kg too much weight but no extra armor to show for it. I think they should be allowed interchangeably as the unit desires -- you get the extra firepower or the slightly better high-alt performance with a lighter loadout.
However, the G-6 and the G-14 are the same plane with MW50 added to the latter. The G-6 A/S was a high alt variant with a higher FTH like the G10 or K4, but without MW50.
Currently the G-6 and G-14 have the same off-wep speed curve in AH. with a FTH around 21k instead of closer to 26k like the A/S probably had.
Also, as a general rule MW50 was very scarce to begin with. It really wasn't until mid-1944 that it started showing up with some regularity, and then it took a while longer to become commonplace. Early 190Ds, for example, were "Dry" and did't have MW50 to boost their power. The systems just weren't available. Thus, if the A option is chosen then the G-14s really wouldn't fit much. Depending on the rest as well, they probably wouldn't fit much in the B option either.
Edit: Regardless, the G-2s were long replaced by early 1944. As you say.