The thing with Taillon is he was already the worst projected member of the starting 5 coming into the spring. In fact generally he projects behind Brown/Wicka/Assad too. So any signal that "hey this guy is materially worse than your (already low) expectations" is a bright red flag.
He also looked pretty bad in his WBC start against Panama. He kept runs off the board because it's a glorified AA team but that undercuts any sort of "savvy veteran saving his bullets / waiting for adrenaline" type excuse.
The team has alluded to a lower body issue, and he's got a lengthy history of those. He also looked like himself the first two innings of his last ST start, and Counsell said he faded later in the outing because of the heat (pretty reasonable excuse TBH). There's a chance this was much ado about nothing and alarm bells were raised over a fairly normal thing that we suddenly received transparency into this year. So like of course give him a chance, frankly give him at least a couple, but the leash can't be especially long.