For me, personally...every reverb I've ever tried, beginning with the springs on a Peavey Musician back in 1974, thru Lexicon MX-200s, various Alesis, Yamaha, Mackie, Behringer, A&H and other consoles, all plugins, including Izotope, Cakewalk, T-Racks, Valhalla, up thru and including our Bricasti M7...suffer from one, consistent obstacle.
The "amount" knob(s) sweep is X percent "not enough", and 100-X percent " way too much", with the sweet spot occupying about one quarter of a percent range of the knob's travel.
One step deeper into this issue...the sweet spot varies slightly from song to song, depending on density and timbre of other signals, in relation to whatever spectra work for guitar on that song.
We just got a pair of Eventide H9s, one being a Max (making both Maxes, since the algos are licensed to 5 devices).
Though I have yet to escape the preset jungle, two things seem interesting.
One.. very few, if any...hate Eventide reverbs. Solid palatte to work with.
Two, any variable, or vollection of editable variables can be assigned to and expression pedal but that's not all.
Each variable, independantly, can have a portion of its total range assigned to the full range of the expression pedal, such that the tiny "sweet spot", between "too little" and "too much", can be spread out across the expression pedal's full range of travel.
That's theory.
I'll holla back when I have time to prove or disprove it.