Felix has all the tools but I think that he will have serious problems from time to time with his command.
I would like to have seen him finish out the year at AAA and continue to work on getting the BBs down. Then see how he does in 06 ST to determine when to call him up.
MLB is not the best place to learn to get your command worked out especially for a poor team like the M's. I think he will struggle more often than not in the near future if he stays up at this level. Just my opinion.
"Think of how stupid the average person is, and realize half of them are stupider than that." ~George Carlin