Stuff changes mid-development, so I am not too surprised about the parameters being different. A Slime hat would most definitely come with Erdrick.
Reading some of the movesets conceived here, if Erdrick's Final Smash ended up being something out of Dragon Ball visual-wise (the Luminary's Gigaburst comes to mind), then that would definitely make a big first impression on people not familiar with Dragon Quest, as well as give some people more reasons to start calling him/her "Sword Goku".
Anyway, not sure if there is any overlap with Dragon Quest and the Dragonball fanbases here (and I am very sure someone has asked this question before), but were some of you first exposed to Dragon Quest just because of Akira Toriyama's involvement?
For me, it wasn't the case. I was first exposed to Dragon Quest when I bought and played DQVIII 3DS after an employee at GameStop gushed about it when I inquired about other 3DS RPG games, having recently beat "Fire Emblem: Awakening". TBH, I really don't care much about Dragonball, despite how popular it is.