I tend to agree - but anal toys are definitely a niche - a smaller market than vaginal/clit toys. Therefore they have to be more careful about the number of available products. I like the ones that are tapered nicely allowing for a gradual stretch.
They could use a better selection of sizes towards the upper end. Adding an extra 1/4" to the diameter adds quite a lot to the circumference - which is where you really notice it - so going from 2 1/4" to 2 1/2" is quite a leap.
I want butt plugs that step up size in the shaft between the bulb and the base. When I want to open and relax my ass to get it ready to be jackhammered, a 2" thick bulb isn't going to do the job if the shaft that actually hold me open is only 3/4 an inch.