I'd pass on resigning JT if the money and term get crazy, it's not like he's the missing piece that will put us over the top, 80, 81 and 76 (pro-rated) wins the last three years. Anything pass 5 years or $20M or so, 6yr/$25M is nuts for the Phillies (but not a team with a 2-3 year window for the WS, after which the deluge).
Phillies are starting to build a core, they need to draft well the next couple years (especially college picks) and finally hit on one or two LA players (Rojas? Garcia?).
C: Knapp, Marchan the long-term solution
1B: Hopkins
2B: Kingery
SS: ??? resign Didi? Stott in a year or two? Garcia down the road?
3B: Bohm (just has to be "average" or slightly below in the field)
LF: Cutch then Haseley? Moniak?:
CF: Haseley/Quinn - this is where Phillies need someone like Rojas to break out
RF: Harper
DH: easiest spot to fill, Segura for one year (i.e. plays somewhere, pushing different players to DH for rest), then ???
SP: Nola, Wheeler, Eflin, Howard, Suarez/Jones/Medina
RP: Neris, Brogdon, Romero, and who else?
The two keys the next few years is
(1) producing a "surprise" player who isn't a 1st rd pick, whether it's Garcia, Rojas, Simmons, Baylor et al. You need to find one of these guys every few years.Otherwise you need to tank and pick in the top 5 for a couple seasons (Bohm). Where would Houston be without Altuve, the Braves without their second tier LA prospects who surprised. Sixto is the only one I can think of the last decade, and we traded him for an 80 and 81 win season.
(2) producing RPs out of the system, whether it's high potential guys who you move to the pen or college starters who add velo when they move to the pen and surprise. B/c RPs are so erratic, you need a steady supply of these arms, supplanted by waiver wire guys. Only pay for reliable closers, the rest are fungible if you have good coaching.