ARC in 1.20 is brilliant, seems almost perfectly balanced to me. Not ridiculous damage but enough to matter. ARC damage is lower because combos can be executed from any direction (as long as you're far enough away).

The problem with skills saying 'cannot be used now' is annoying and I've noticed it happen a lot more since 1.20 was introduced. Always a pain when you start a combo then can't use the 2nd part because it 'isn't ready', despite not showing a re-cast timer.

Remember Quelling Strike (as well as reducing emnity on next attack) now provides a huge TP boost to your next attack. Open up with that, maybe use Invigorate if you're struggling with TP (I forget if it's LNC-only or not now). Also remember that Quick Nock ONLY shoots 5 arrows if you combo into it. Use Keen Flurry before Quick Nock as well because the recast is long.

Pile your points into Dex (as it boosts ARC damage AND accuracy if i remember correctly) and you probably want a decent amount of Piety as well (for MP and additional ARC damage).

It'll take a bit to learn 1.20 classes but overall ARC is really good once you know how to play it.