So, i'm just gonna put this out there ... increasing the pressure to 50psi will not improve ride comfort. (But it may well increase tyre wear.)
Obviously ride quality is totally subjective, but 20"s on 275/35 should not, of themselves, make the ride "bad". And the suspension doesn't look overly low either, and it appears to have a good few coils to wind down too. So my finger in the air would be either (i) you have a high bar for comfort (nothing wrong with that!) or (ii) if that's not the case, those coilovers could be the issue