D&D 5E Question regarding warlock expanded spell lists

[Charlaquin]

What about when they got tree or four short rest?
Do they over perform?

I once played as a Warlock in a party with a Wizard, a Cleric, a Druid, and a Sorcerer. Our Cleric’s player once commented that every non-combat challenge felt like we were all “whipping out our spell d***s” to see who’s was bigger. I had a Rod of the Pact Keeper and a feature from a campaign-specific background that gave me an extra Warlock spell slot, so I effectively had 4 spell slots per short rest, but we basically never took short rests. We also usually only had one or two encounters between long rests, or on rare occasion three, so none of my four full-casting allies ever ran out of spell slots.

I never felt like I was under-performing. On the contrary, with Eldritch blast, agonizing blast, repelling blast, the one Invocation from
XGtE that lets you pull a target 10 feet when you hit them with EB, and a decent number of area-denial spells like Evard’s Black Tenticles, I was the master of single-target DPR and tactical battlefield control. Meanwhile our Wizard had a bajillion zombies, our Sorcerer did incredible AoE damage, and between our cleric and our Druid no one was ever left wanting for hit points.

 

[Blue]

What about when they got tree or four short rest?
Do they over perform?

They do have the occasional many short rests just like they have the occasion too few short rests, but I don't have enough practical experience with regularly granting them that. And them assuming they will have it, which would impact how they freely they cast. I was just giving feedback based on what I saw at my tables.

On paper, if you're running as many encounters between long rests as I am I would expect that they would. But warlocks are a mix of at-will and short rest (none are high enough for Mystic Arcanum), so I was talking more from observation considering my table blend. For instance at one table I use a rest variant from the DMG that slows down rests, just to give more narrative space while still being able to have a number of encounters between long rests.