First, I want to note that I only posed this for a type of game sequel, not to change the existing PM version of Mule. However if PM wanted to emulate the original version of Mule further in regards to the races attributes that existed, I wouldn't object. None it really made any difference to the original game, which is why I assume it was excluded in PM's version; not worth the effort.
I think this forces people into roles and limits the games strategy. Unless we're talking a Mule MMO..
Not necessarily. In one aspect it may provide roles that conform better to particular playing styles, in that the advantages plus the drawbacks may prove more comfortable to a particular player, because of their strategic style of play.
Ultimately, no matter the pluses and minuses to the roles they would have to remain balanced thus the negatives in some way negating the positives, and vice versa, to establish the equality of each player at the start of the game.
Also the same generic balanced persona role for the ones that want to dabble free of benefits and drawbacks into each of the commodities, would and should still be available for those who are more experimental and varying with their methods of strategy. Can name this role "Old school".

Thanks,