This is all true, but it hasn’t seemed to have hurt Nova’s pick rate too much in QM. It’s not hard to see why, an attractive blonde lady with a huge gun, who can also stealth, is appealing to many.
Likewise for the Li-Ming players, flashy spells, sassy, a huge wardrobe of skins to try on, coupled with a mage with mobility baked into her kit, is irresistible to many. Naz/Azmodan, also infest QM, as they are easy to play, and can gain value for low skilled players, due to their PVE power.
Despite sometimes feeling in a hopeless situation, such as being forced to play with Murky on Braxis, when he has little chance of holding a solo lane, I like that QM often has unbalanced and weird comps. Less than optimal comps, can force your team to work together and come up with unconventional strategies to win, which can lead to very satisfying matches, so I wouldn’t want to ban/avoid any hero, even if I really do dislike playing with Nova.