While I'm not doing cart wheels, Garcia is an upgrade, as for Plummer, I think this is a great short term move, it's a conditional draft pick, (see the word conditional?) that means if jake decides to retire, then there is no pick.
Also, with us getting the RIGHTS to plummer, that keeps Oakland in the hunt for a QB in the draft, and it gives us a chance to TRADE Jake's rights to a team that he DOES want to play for (Houston?), assuming that he doesn't want to compete for his position here.
Ok, we'll probably be back to square one in a year or two, but a lot can happen in that time?