Your analysis is sounding more like the old Soviet 5 year plans. Best move for the Mets now is to write off the next couple of years and re-tool. MLB teams need 6-7 reliable starters to fill out a season. Overpaying 1-2 starting dudes for the Mets this off-season assumes excellent health, which nobody in their right mind should expect. And with the FA market for starters so thin this year, the top 4-5 pitchers will be overpaid. Once in a blue moon there's a Gerrit Cole who you open the sack of gold for. Scherzer has already been that guy. It speaks volumes about how thin the pitching market is that he's the #1 arm available. More often, there's a slightly-above-average guy coming off a good year who signs an absurdly huge deal ends up hobbling the team's payroll for years to come.
As much as I like Max, his arm has some serious miles on it; it would also be nuts to count on Degromm running out there every 5th day for the whole season, so you should bump that number of starters in the Mets fold, which includes AAA, up to 8-10. Walker? Megill? I guess all teams need to take a leap of faith in some of their players.
With Eppler, I can easily see a redux of his years with the Angels: high payroll, terrible results. Marquee, cashed-up players who waste their primes waiting for a pitching staff that never arrives because the team's payroll is already too high. I'm sure his mandate is to win now, and with Brodie's mess, that's not possible. And I wouldn't trust any GM candidate who said otherwise.