Yes, I thought a second yellow would mean Stephens missing Liverpool next week (and your links confirm that) so I'm surprised CH didn't make a substitution to avoid that possibility.
It's not as if he really 'used' his substitutions today - swapped a RB for a RB, then swapped one winger for...
Yeh, so would I - either JL or Knocky would have been fine, and give the lad 10 - 15 minutes. Nice to see CH trusts our youngsters to play a part, though (!!!}
TBH, I couldn't see much point in our other two subs either, unless someone had a knock or a niggle.