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

Celander, sorry to hear about your friend.

They are not expensive compared to Gryphon, FM Acoustics and other Swiss brands, or even some Japanese, I guess.
Yeah, those lights would bother me, that's BS. Big and heavy, all good amps are big and heavy and inefficient.
Not enough top end resolution and energy - now this is a weaker point.
Being on a slightly warm side of neutral is a strong point for me. Redgum amp that I have is exactly that, good balance.