If all those arms are healthy, I do think the rotation will be “OK.”
But first of all, “OK” isn’t exactly the highest praise. And second, they’re not likely to all be heathy together very often.
I’d love to see them add Lopez, although not sure how yet. Senga? He certainly has a track record that impresses, although I really know nothing about him. Eovaldi would be nice, but honestly, he’s closer to fitting in with Sale, Paxton and Kluber.
I’m not going to get worked up by Kluber because 1. he hasn’t even been signed yet and 2. he has a recent history of eschewing the Sox for other AL East teams.
As for a TOR starter, all the free agents this year are either really old or have significant injury histories. I can see going on the fringe market for free agents, and then exploring the trade market for impact starting pitchers. Lopez is a great candidate. If it happens, I assume it will be along the lines of 1. sign a shortstop (Bogaets? Correa?) long term and then 2. deal Mayer for a TOR starter, hopefully one under 30.
And then hopefully extend him…