Well, there are some other planes that have in AH a role MUCH more significant than in RL. Most notably the Me 163. In terms of engine reliability, we could also argue about the Me 262.
I agree, and can name other examples. However, none of them are as egregious as the He177 being the main heavy bomber over the B-17, B-24 and Lancaster would be. The dominant fighters are the P-51D, Spitfire Mk XVI (LF.Mk IXe) and La-7. Only the three gun La-7 is egregious in that list.
Some typical loadouts:
48x50kg
12x250kg
6x500kg
6x1000kg
2x1800kg
None of those seem too bad. Depending on its survivability it shouldn't be a threat to the Lancaster's position and may not be a threat to the B-17's either. It should be modeled as being structurally fragile unlike the other heavy bombers I would think.
You mean much like the 262 is applied in AH? Its presence can certainly be considered absurd. Yet we are used to it. The B17 may have been practical and the He177 may not have been, but the B17 was also a 1935 design while the He177 was a 1942 design. A lot of tooling and technology development happened between those years and Germany was the world leader in machine tooling.
The Me262 is rare in AH and is not dominant. None of the other stuff you mention is relevant.
Also consider that the a/c in question can be perked, like the 262 and B29.
Aircraft are only perked for performance, not rarity. It would be sheerly absurd to have the He177 modeled as being so good it has to be perked.
People also conveniently forget that the withdrawal of the He177 fleet from service can be attributed just as much (if not more) to fuel shortages and industrial manufacturing challenges as the aircraft itself. The Luftwaffe simply had no fuel, nor pilots, to maintain a bomber fleet. These problems should not be translated into aircraft shortcomings.
The German pilots refused to fly it post war. Would. Not. Fly. It. For. Pay. That was not true of any other German non-rocket aircraft.