I think with Gregorius and a Refsnyder / Ackley platoon (at worst), plus Greg Bird, they have some good young pieces in the infield. Gardner is showing no signs of age, either.
as for Houston, don't sell their other pitchers short. McHugh has been terrific for them, and they probably can't start McCullers with Fiers and Kazmir ahead of him. Nice group of relievers, and Marisnick / Springer / Rasmus can shag flies.