The following thoughts are purely cosmetic and I am sure not groundbreaking, Admittedly I've only been able to play around with Fiendish warlock so the following is purely for them!
Eldritch Blast
The Wiki contains far more information on how Fiendish warlock Eld. Blast functions, namely the additional effects while your warlock summon is on the field. (+ Cha to Damage, Fire Ab impact, Cold AC impact, Negative Lifesteal) - Perhaps information for these could be added to the otherwise currently rather sparsely detailed "Warlock - Fiend" feat?
Eldritch Blast (Visuals)
This one mostly comes down to personal preference and is highly subjective, but I feel the visual effect for the negative energy blast isnt the most suitable - and that there are more suitable ones out there.
Currently (https://imgur.com/a/lB7bLrW) the spell produces a large AOE visual around the castle (Ala, Create Greater Undead/Mummy Dust) and a Dark Cloud effect over the target (Ala Bane and other debuffs)
I feel this is fairly over the top for a spell you're going to be casting very often
Suggestion for replacement?
For Caster: Red Glow (Aka, Paralysis Glow)
For Target Negative energy snap (Aka Vampiric Touch)
Summon Creature 1/2
Same sort of theme of request, Big, pillars rising out of the ground animation for a level 1-2 spell which shakes the entire area. Thought is, for these lower level summons have their summons be a bit less over the top and dramatic, besides when you're trying to be more subtle with these things - when you need to be, at lower levels - having the entire area not shake is generally preferable!
Just thoughts anyway
