There is a problem.
Most people gripe about the loader working too slowly. Just so you know, Kubota does read these forums. They have people that do it and send the gathered info to corporate and engineering and sales. Anyway, so they "speed them up", and/or add lifting capacity--which was always another gripe for a lot of folks. But keep in mind, this is a small "hobby" tractor with basic features. If you need better features, the GRAND L series is available, though I'm not sure even the Grand L's have an adjustable drop speed (don't think so-but it might be an option). To get true and better control over the hydraulic functions, a tractor would ideally be designed more like an excavator or skid steer, using a pilot operated variable displacement pump, but that would be a total (and very expensive) redesign of the entire tractor's hydraulic system, which would then put the standard L series considerably more expensive than their competition, that is, unless the competition were to do the same thing, then they'd all be back to a level playing field--at least until one of them decides to cheap out somewhere else.
When I did more JD stuff in the 1990's, the speed of the loader on some of the 70 series CUT's were "adjustable" by using a drop-in restrictor. Well some customers found out that a dime fit in there just as easily and was "more adjustable" by drilling a hole in the dime of a different size. Some guys liked 1/16. Some liked 3/32". But the problem in doing that is that restriction causes pressure buildup which creates heat, so one has to be careful not to heat the hydraulic system too much.