The B3350 has long been known as a Kubota to stay away from. I'm not aware of any other DPF models that have a reputation for being problematic. When the ECU tells me to do a regen I do it and don't even think about overriding the "suggestion". So far no issues in around 400 hours of DPF ownership.
The reformer based 1.5 L engine as used in the B3350 was also used in TOL F series mowers and (I believe) TOL ZTRs as well as multiple industrial applications.
If my information is correct the OP did not inhibit any regeneration operations, though such is possible and I routinely did so with my B3350 (since sold), but only after I understood the firmware algorithm.
Reformer based B3350 DPF system completely different from all electronically injected systems, which are usually seamless.
Regarding problematic, stay tuned for DEF systems, which will almost certainly prove problematic for many (most?) owners. Utility tractor usage is much different than PU usage.