Young & yeasty, with a farmy note, plenty of banana, brown sugar, and sweet vanillin: I'd say the rum casks are actually pretty noticeable.
I'd have expected more smoke at this age, too. In direct comparison, even the regular OB "Port Ruighe" strikes me as peatier, and that at 45.8%.
I don't have a problem with young (or NAS) Taliskers - I quite liked the 57° North, for instance - but this is really disappointing.
No burn despite the high ABV, kudos. Other than that, it's merely super sweet, estery, moderately peppery, and softly smoky. You can get a similar experience with some young blended Islay malts for about a third of the price.
Banana puree, a boozy, sugary note, and earthy-peppery Talisker smoke.