This is not my main vinyl listening setup. In the past year I purchased a brand new system top to bottom. The TV got kicked out of its space. So I am putting a home theater in the basement for the TV. I totally agree with you that the separate integrated with pass through would be the real way to go. Ironically, I have the perfect one for the job. But it is in my main vinyl system and isn't going anywhere.
I had my old TT/Phono pre. So I thought that I would put it downstairs with the home theater rather than having it sit around and gather dust. I don't have the space for a second turntable in my vinyl listening room, or I would use as a second turntable. So I don't expect much from the home theater amp. But it would be nice not to have to send it through needless, pointless, digital conversion, which can only serve to degrade the signal further. Maybe someday I will have the cash to do it properly, as you have stated. Which is the only sensible solution. But in the meantime.....