Fletcher C3 here
IMHO, fletcher got way better than it was before BUT you’ll need investment on gear and attributes.
Also, all fletcher skills scale pretty well, but now you need to invest some points to see the damage growing, especially crossfire.
My barbed arrow lv.1 crits now for 19k (5k ~ 7k per hit) on Helgasercle (lv 280 world boss, using a +6 Aufgowle bow with 2x Lv6 yellow gems, 30% attributes) and crossfire lv.15 crits goes up to 18k.
Fletcher 1 seems lackluster, but keep your hopes to fletcher c2 (magic arrow is incredible) and c3 (Lv 15 crossfire or barbed arrow and divine machine arrow deals great aoe damage).
The biggest difference from actual fletcher from old fletcher is the 5 overheat in crossfire and barbed arrow, which makes you need more skills to your rotation, not only fletcher ones.
My favorite build for fletcher c3 right now is Archer 3 - Ranger - Fletcher 3 - Mergen for an all-round damage (AoE with barrage, crossfire and DMA) but focused on single target, using Lv15 Multi-shot, Lv5 Twin Arrows and Lv5 Critical Shot when barbed arrow is on cooldown (but still having crossfire lv 15 for a bit of AoE).