Cap'n Kobold
Hero
Could you give a timestamp please? I watched the video and I can't see it.He does see it and talk about it. I think you've lost some objectivity on this topic. ANYONE who says they like the Warlock changes you go off on at this point.
I generally have a lot of time for Chris, but his mocking dismissal of the issue that a number of us see without apparently understanding it was disappointing. I'm aware that he might just be reacting to youtube comments (which don't exactly have a lot of nuance.)
The issue of using half-casting progression (we'll get to potentially spending your invocations on Mystic Arcanum later,) is that combined with the extreme power of powered-up Eldritch Blast, it is hardly ever worth actually casting a spell if just Eldritch Blasting again is an option.
This is what Neonchameleon is talking about by "what it does round-to-round".
You might not get any spells worth casting instead of EB until 9th level, as the campaign winds up, which is where you could start dropping fireballs. Until then, you may just be reduced to Hexing and spamming Eldritch Blast all the time in fights.
Now Mystic Arcanum does give access to higher-level spells, but it is not like a full caster. A 5th level Wizard can cast 2-3 Fireballs a day using their slots. A Warlock can cast a Fireball once a day, but that is all they can do with that slot. The Wizard could use those slots for Fly, or upcasting Hold Person, or whatever they have the spells prepared for.
If the Warlock's fights begin too close range, or they're in a city, or another reason why Fireball is not an appropriate spell to use, they effectively do not have a 3rd-level spell.
I think that Treantmonk looked at the new Warlock from an optimisation standpoint and saw that he could make some builds that worked well under the standard optimisation assumptions.
I believe that there is a lot of potential variety and interesting to play builds that the current Warlock can be that the new one can't however: Most of the build variety in the new one seems to be "will you spend almost all your invocations on Mystic Arcanum, or only half of them".)