Overall, I have to say that I agree with your disappointment in the 50W .. I am not a fan of it, which sucks because I really liked the minor tweaks in the outer build quality on it .. My vape is frustrating at best ..
The sad thing is that when Robbot first asked me if I thought they should do a 50W version, I told them no I didn't think they should (true story) .. I am going give them feedback on all of this. They had cut their teeth on the ZNA 30 which is the first electronic device they ever tried to make, so IMO they should have just continued to improve on that .. I LOVE my ZNA 30 from Robbot, from how it performs to how it looks ... this one, Ugh I should have passed on