If you only want delay, the eventide stuff is great. You can get an H9 for dirt cheap now. The H90 is great but more expensive.
The meris is cool, but has a lot of stuff I never touch. Probably overkill if you’re not programming crazy ambient stuff.
I have a clinch ep pedal that has a kbob for variable boost. Somehow I need this too, but in a dual pedal. Maybe with a blues breaker? Get my Mayer on!
I run a modeler into a power station and into a guitar 2x12 open back cab sometimes. Sounds pretty good. Anything cleanish should do. Just experiment and don’t spend $ up front. You probably have something already that will do the job
It’s probably the led. They’re simple to replace. My FX loop bulb went out and I replaced it myself. For some reason the bulb is part of the circuit so when they go out you lose the function.