I my very old instant WW2 posts, I remembered showing off destructible buildings using wooden blocks (Lego also has that potential), but a better advantage (knockoff) Lego gives you is realistic casualties:

Think about it… the guy carrying the Panzerfaust takes a hit and goes down, the squad can actually scramble to recover the weapon. Instead of the guy and his kit vanishing, or that same guy being extremely lucky, because all his squad mates go down first.

I was also messing around with rules, trying desperately to keep things as simple as humanly possible, but it’s never that easy.
I went for a roll off, higher roller gets to activate a unit, then roll again. Loser from the previous roll gets a +1. Once a side has entirely activated the other can go with everything it’s got left.
Shooting wise it was straightforward too, you’d generate a number of shooting dice for a squad based on their weaponry and ranges, and then hit on a 4+ against targets in the open, 5+ against targets in soft cover, and 6 against targets in hard cover.
I never managed a melee, but I bet it would have been a roll off, higher roller kills opponent sort of thing.

There’s also no need for ‘pin’ markers with Lego as you can physically make the figures put their heads down.
But none of it seemed all that innovative. I suppose though you don’t always have to innovate rules to have a fun time.

There’s always the toss up of going squad based, or keeping things to the individual. I like the individual approach, especially for WW2, but it does slow things down if you’re playing bigger games.
Much to mull over.
Apologies for the short post. It’s been a socially overstimulating week, and hot to boot, so my brain is cooked.
I kinda like the idea of wargaming with Lego. And if it’s fun …