These things don't exist in a vacuum. If you play Yoshida in LF (the only position you can) you then can't play two of Duran, Abreu, Rafaela, and Anthony, with Schwarber DH'ing (I assume you've traded one). So our our athleticism has just taken a massive hit, and so has our defence. In the meantime we've added a lot of payroll.
Now, we still need two middle infielders and (another power bat) and a number 2. How are we affording all this? Because I think it's fair to say that if we'll be spending way over limit 1 there is no good way to call the ownership cheap, and yet this is all going to cost a lot more than that (probably the higher levels of limit 2, going into 3). You could say that we don't then get two infielders, just one, but that means an often injured Mayer and a limited Romy rocking up as every-dayers with Sogard and Hamilton as the back ups. Yikes.
But say we pull off the 3 big offence signings, (say Schwarber, Bregman and Alonso as well as a #2) we essentially have 3 DH's on the roster already with Massa, Schwarber and Alonso/Casas, and you can add Bregman to it in two years too. With Massa gone it's still 3 DH's (Schwarber, Alonso/Casas and Bregman) with 3 of them being forced to play the field at all times which would hurt us badly just because we wanted Schwarber while sticking our fingers in our ears. Plus it'll screw the next team we need to build.
Having Schwarber would be great in an ideal world (say 4 years ago), but roster building needs to make sense. He was sensational last year, yet hardly anyone bar the Phillies and possibly us (and I believe that is only if we can make the roster work - IE get Masa out of town) are in on him. There's a reason the Yankees or the Dodgers are not going hard for him. Because it doesn't make sense for their roster, despite how good he is.
Unfortunately, it makes little sense for ours right now, because we're stuck with an overpaid, light-hitting DH we can't shift. And with the holes in our roster that $18m is a lot.
Hopefully we can pull magic from a bottle. Until then, we need to make moves that make sense to our roster, not fantasy baseball.