I personally feel while sin dt is incredible and powerful the fact that majin form was so rarely seen and strong enough to kill all bosses in a few hits. Once you transformed into that you knew absolutely nothing could stop you. Itd be insane to make sin dt this powerful with how accessible it is but i wish they did something to make it feel a bit more foreboding. Ever since 3 dantes power hasnt felt like anything too special since its always written to be a counterpart to vergils power now. Before ot felt like dante was being built up to become even stronger than his father and something no others could oppose. Like he had this hidden well of infinite potential but now that signifigance feels it has Been cut in half due to always needing to have vergil as his equal now. I could accept it if 3 had him fully inheret his fathers will and power with the force edge being his but despite it all instead of feeling like spardas son, the second coming of him for the modern age vergil and dante both end up feeling like just halves to him. Not being able to live up to his legacy or power entirely on their own whereas 1 and 2 really felt like dante was spardas successor. It would be fine if it was just 3 but dante and vergil are both in their 40s and still dont seem to have matured a bit into anything i could declare successors to sparda. TLDR; Both Dante and vergils sin dts only feel half as powerful or intimidating as dantes dmc2 majin dt. They both still have badass designs tho.