Tal had a great positional understanding that was probably overshadowed by his love for the spectaculor.
Some good examples are from a 1979 Interzonal where he went 11-0 at age 43. It's scary to think what his ELO could be in today's game when compared to, say Ding Liren near 2800. Liren, though a great player, doesn't yet appear to have nearly the positional understanding as Tal did.
From 1979:
So how do you explain thay Ding Liren is being rated 100 points over Tal's peak ? We can believe that he's far stronger or has at least the same level.
Maybe someday I'll get up to Colonel Moreau level.
Id be happy with the Col. Mustard level...