It is possible to "wing" Hero. I've done it, for much of a campaign, in fact. As with any system you just have to be very familiar with it... there's just a lot to be very familiar with. And, of course, there's a knack to it that's not entirely learned - part of it is just liking to run in that style. I know very good DMs who will not 'wing' anything more than they absolutely have to.If only I could "wing" Hero like I could AD&D; I'd never need another system.
Bounded accuracy is just the 4e treadmill switched off. Ability-score saving throws I seem to recall from classic D&D (maybe 2e - not in the same sense, mind you, it was rolling under your stat for things not covered by regular saves). Skills by Background reminds me strongly of the AD&D 'secondary skill' table, where you determined what sort of work you were learning to do before you took up adventuring.I've been pleasently surprised by how much they have innovated so far, with things like bounded accuracy, ability-score saving throws, skills being tied to background instead of class,
Advantage/Disadvantage is the only new idea I noticed in the playtest. Not sure how good an idea it is, but it's new. And, even it's not /that/ new, as 4e was full of re-rolls.
So, celebrate D&D's origin, while at the same time denying its roots? D&D grew out of Chainmail, which was a wargame, and 0D&D had 'wargames' and 'miniature figures' right on the cover.3) Create a basic ruleset that celebrates the key distinction of D&D being the first RPG ever made - and not reliant upon miniatures and wargaming tropes in order to be able to play.