I'm glad you bring this point up. I have pretty much been in favor of the "great rebuild" for a few years, but have also been noticing the trend of taking it a bit far. While I would be more inclined to trade in this type of scenario because the Mets still have a lot of pitching depth, and the great pitching did not really help the Mets avoid stinking last year, we do have to consider how dominant the rotation would be if both Santana and Marcum have great years. Assume Neise and Harvey continue to grow and Gee does what he does, the team really could be in serious contention. We've got a ton of arms in the bullpen so you have to assume one or two will rise to the top, and while the lineup remains pretty suspect, they just have to get hot at the right time.
I have a much bigger issue with people who suggest trading Wright, because there really is no way to replace what he contributes for years. I think that Johan and Marcum could be pretty easily replaced mid-season with limited drop off, but I can actualy see a scenario where this team as presently constructed can compete - particularly with those two pitching lights out. I think the real wild cards will be TDA and Duda. If TDA gives us .280 with 20 hr's, and Duda can give us .260 with 25+hr's, throw in .265 w. 15hr's from a combination of Kirk and MDD (certainly a best case scenario), and the lineup should score enough to support top notch pitching. Tejada, Kirk, Murph, Wright, Davis, Duda, TDA, Someone. Pretty balanced, with some on base abilities at the top and a nice stretch of guys who can knock a few over the fences sitting at 4-7. There's a lot riding on Duda this year. If he can't improve on the 20hr power (which I think he can) and inexplicable stretch that dropped him from .280 to a sub .240 hitter last year, then the lineup is pretty suspect and I have a very difficult time seeing how we compete.