The difficulty of this game is that we have to put ourselves in Larian's mind (ugh), not just state how
we wish it was done. For
rest, I had it easy, since Nick Pechenin explicitly described how it would likely be. For class features, I have a lot less. The only starting point is what we already have.
Barbarian- Rage : will probably work as Shapeshifting. They're both a kind of trance/super-state mode.
- Reckless Attack : I'll ... not say anything on that.
Bards- Inspiration : I'd bet on a bonus that applies "to everything", Guidance style, but disappears after the beneficiary makes a roll. So it would really apply to the next roll only.
- Cutting Words : I'd bet on it receiving the same treatment as the Battle Master's Riposte (auto-consumes your reaction and Inspiration Dice). Perhaps only if the enemy attacks you.
Sorcerer- Metamagic : I wouldn't be surprised if Larian ends up using a system similar to the Warlock's Eldricht Invocations, i.e. you choose customisations features that apply permanently. If they can implement it with their engine (...), they might also do something like Mage Armour, that you can cast at the beginning of the day (costing Sorcery Points) and lasts until you rest, as a sort of aura.
Wizard- Diviner's Portent : another hard one, yet very important to me. I would bet on Larian rolling the d20 dice, and then, for a bonus actions, you choose one of your dice to be the result of the target's next dice roll.
