Maybe you guys need to speed up like PDRed302 and myself.
Takes me an hour and a half to gravel vac and algae scrape, gravel vac 125, switch faucets 37, algae scrape and gravel vac. Cleaning my FX5 takes almost as long and it's done every month or every other.
Water quality I think is helped and hurt with gravel depending on your care. If you vac it, it helps to keep it somewhat out of your filter and you do have a lot of BB in it to quickly break down amm and nitrite rather than have it in the water column. If you just leave it there, it hurts because you're compensating for it by doing more WC's to combat nitrates. But that might be with the correct amount of gravel too. I prefer about 1.5 lbs per gallon, so my 125 has 180lbs of it.