I treat kancolle more as a "what if" series.
Yeah, it's revisionist, but so is BF5 and COD WWII, and those don't have the advantage of being a fantasy waifu gacha game; BF5 even has an entire chapter peddling the unwilling "Wehrmacht is innocent, just following orders" thing, and that's far worse than implied revisionism.
Plus, if you're talking actual propaganda/revising reality, kancolle is tame compared to GATE. The bathhouse scene practically hurt to watch.
AL's advantage is in gameplay and peak cat/foxgirl waifu character design.
Compared to KC, you have more control over outcomes (i.e you can basically guarantee wins with grind) and there's near zero resource management. It's simpler.
I actually enjoyed the Combined Fleet/logi aspects of KC more; it took more time and success was not guaranteed, but wins felt better, like they do in Darkest Dungeon. It was a combination of stats you ground, fleet comp/logi, and honestly luck.
AL naturally has more characters of all nations/factions, but almost all of them were designed to be waifus with little regard to "hull history".
For example, the Fubuki class all have the same uniform in KC. The Ayanami class have near identical uniforms BUT start with Fubuki's Kai Ni color palette (i.e Ayanami is an improved Fubuki class).
The Kuma class have similar uniforms, but Kitikami and Ooi have radically different ones, because they (unlike the other Kumas) were specifically remodeled to torpedo cruisers, which happens with their revised hull upgrades.
You see correlations among pretty much all of the initial characters, and most of the ones added in later too. In general, if you know the history of the ships you can extrapolate how the character designs relate and vice versa. It's to the point that you can ID many of the ships used in Ten Go based on the uneven socks originally found on Yamato.
In AL there is little correlation other than between sister ships. Sometimes even they lack any correlation.
It doesn't really matter in the grand scheme, but they did put effort into at least trying in that regard.
The other thing is that it can get people looking into the histories of these Axis ships obliquely. I would've never bothered to look into IJN ships solely because of the history of those who commanded them. I would've never bothered to look into GZ (which was always an unfinished hull) or Nagato or Fubuki or any of them.
The histories of these ships in reality are bleak (in both use and sinking). I'm not discounting that.
At the same time, stamping out things on an external level (to the point that you'd rather watch characters die and suffer) based on your internal disdain for them is....an interesting parallel.