What are the weak points of Pass amps and pre-amps ?

By "weak points" I meant more their weaker points compared to their strengths, not something that they do wrong.
I don't believe in absolute neutrality, and I most definitely don't want sterile sound.
ebm. you now have Audia Flight amps, how do they compare, what are the differences ?
Pass Labs is not the uppermost high end, as I understand, speaking of a wish to have them at any cost. As for value, they in fact do appear to be an excellent value. Not engaging enough ? Not much to write home about ? Just excellent amps ?

So if I had to absolutely nitpick...

250.8 - runs warm, no question it warms my room up.  Not horribly so, but it does.

May not be the absolute best at top end resolution and sparkle.

I've heard Class D amps that are a bit punchier in the bass, a shade tighter.

You can get a similar sounding amp with similar specs (BAT) for a bit less money though the specs may differ a bit.

Bias meter more for show, though it's nice to have an idea when it might be moving out of Class A operation.  Plus it looks cool.

I have never heard a Pass amp.  But I wish someone would come up with some serious weak points so I won't feel I absolutely have to have a XA25.

A friend owned Pass gear. Sounded great with his system. He passed away; so much I miss him and his love for audio.