You hate to overreact over one match, and considering how close the finals were, Spencer very well may have won the thing if he'd gotten the review and/or call in the semis (probably would have majored Suriano), but I'm leaning toward leaving the shirt on.
If Warnerov had won in dominating fashion and Spencer hadn't struggled, it would have been tempting to just pull all of the shirts, plug in PDIII, and go for the whole enchilada this season. Looks like Cash is a potential high AA anyway, and Warnerov will benefit a lot from a year of gaining strength. Even if Spencer could give it a go the rest of the season, it seems pretty clear that he'll be stronger on that knee after more recovery time.
We still have some horses this year and very well could finish higher as a team this season than last year without any of the true freshman studs in the lineup, particularly if PDIII finds his way into the lineup, which I think will happen. So I think we keep the stallions in the barn, let them get stronger and 100% healthy, and turn them loose next year.