Well here's what sells me on a game:
Quality AI feature, ahistorical outcomes by the AI do not bother me and if cheats must be programmed to make it challenging then so beit. I'd rather deal with cheats on the hardest level, than to be able to defeat it easily.
Personally I like "random" games, every game. I like ahistorical events, things that happen that did not happen just exactly so during the time period or war. We already know the history of the actual war, we know the outcome. I see no reason to play the same repeat of the same war. The setup situation is all that needs to be historical, from there the player and the events lead to what happens. HOI C.O.R.E does this almost to perfection now. I have computer Third Reich and I find it boring, because it is so repetitive with pretty much the same actions, and the same outcome every game.
I like turn based/hex based wargames.
I also like lots of units, so I go with the divisional unit sizes, but, would accept an option for this, but, I have a feeling that might be too much programming to make two games in one. One for divisional and one for corp. play. Low priority here.
Research can be simple or complicated as per the HOI game. I can adapt to either one. I prefer the complex, but, it's not a major.
Unit models would be my preference, detailed unit models even better.
I like sometimes playing minors, but, have no idea how this game works with minors or even if minors are allowed as a playable possibility. A request, not a necessity.
My play style is solo or hotseat or PBEM. MP over the internet is not necessary for me.
I'm not familar with the '33 scenario, am more used to starting in '36. But, I will try/learn anything necessary as long as there are some ahistorical elements involved.
Depending on how many players can play at one time. I would like to see an AI for each of these spots. Many times playing Third Reich I wish I didn't have to play all the allies or all the Axis sides.
I also would like the option to continue the game after the finish date for whatever you decide should be a normal finish date for this war/era. Reason being, I always wanted to play out the whatif USA/Russian war had begun after the finish of Germany. Plus to continue to try to invade mainland Japan, instead of dropping the bomb. I imagine that would take some serious thought for a whatif situation, should the US decide to continue the war, having to create an ahistorical AI for each playable country, but, it would be interesting to see what you could do. It might be fun to see the allies turn upon one another as the US declines to accept peace and gives the world the impression they are continuing their own conquest of the world.
Well that's my 2 cents. I'm sure not all things are acceptable, but, you asked for ideas and suggestions and those are my own. ;)