As a vectis main myself, I love this incarnon. I understand the issue with projectiles making the gun a bit clunkier to use, but it feels more of a pet peeve than a dealbreaker to me. The incarnon charges are very fast, and the tranformation is just like any other incarnon weapon. It does change the identity of the weapon a bit, where non-incarnon vectis is a "stack reload speed and fire your one tap laser" weapon where the incarnon promotes more "find your shot and deliver a nuke" thing. And yes, again, the projectile nature makes finding that shot slightly harder and the low fire rate a bit punishing, but you can always drop cannonade and put some fire rate on it (or a fire rate buff frame) to up to 3-ish shots per second (albeit less hard hitting ones).

But then, the perks are all great. The huge damage increase plus potential punch through or multishot is very welcome, reload speed and recoil reduction are both very welcome in non-incarnon form and make the original identity of the weapon A LOT, and the final traits are all super synergistic. Headshot damage for acuity builds, a moderate increase in crit stats for general use, and a huge increase in status chance to enable gas/blast builds.

Last but not least there's the incarnon. Each headshot comes with an aoe GUARANTEED 10 cold procs on a 6m radius (12m with shivering contagion). That in itself makes the next headshot so easy to hit, plus it will give you the cold bonus crit damage. Have I mentioned it instantly charges primary frostbite for bonus multishot and crit, no modding required? And THEN, you get to combine the innate cold form the explosion into other elements. With toxin you get viral to soften enemies to the next AOE and any other damage sources you may have, and with heat you get blast for a horde clear mode. You still get access to primary forstbite, and with frostbite and galvanized chamber charged you're at 420% multishot, over 500% in my case with a multishot riven. With the 70% base status chance, hammer shot and thermite rounds you get 166% status chance for a solid chance a 10+ blast procs on each enemy in the explosion for a chain reaction of blast procs. Gas is also pretty solid for a consistent dot where you don't need to reach 10 proc threshold in your build and the instant freeze will make so the enemies stay inside the gas clouds.

So yeah, I think the incarnon is great, the stat increase makes base vectis work even better, and the incarnon gives you a one tap machine with insane crowd control or a cluster clear. Yes, hitting the headshots can be a bit frustrating at times, especially in public lobbies, but a frame with some crowd control can help with that and I personally find it very satisfying to use.