I always hate these complaints.
1) Who has "great depth" beyond the #7 spot on their roster?
2) How deep are playoff rotations? Usually 7 deep, with maybe a few minutes given to an 8 or 9 guy based on matchups, but they are never a decisive matter
We have KW, MS, JT, JB and DT as starters, with EK and RW as backup bigs, and BW the 3rd guard. That's 8 (was 9 with GH), and other than Kanter's defense there's really not a glaring hole.
This news promotes some combination of Semi, Grant and Langford (health depending) to a total of about 15 minutes a game between the 3 of them, matchup-dependent, with the rest of Hayward's load going to an increase to the 4 primary non-bigs, and probably JT doing a bit more ball handling. The biggest fall-off is from GH's outside shooting and drive ability. But if that is (was) Hayward's main strength, it's a strength that we have in depth. This isn't like losing Kemba's speed and finishing, or Smart's D, nevermind the things the Jays bring to the table.
I'm bothered, but not distraught.