Meek-

One thing that you can do to alleviate a captains concerns in such an event is to make sure that you are both on the same page when it's actually happening-

I have no problem with deviating from standard profiles when operations dictate it's necessary. In fact, odds are that every flight crew deviates from standard in some manner everyday- it's simply a fact of life. (Ever notice how when you fly with somebody from training who absolutely must fly the book exactly, things just don't go quite as smoothly?)

Like I said- I have no problem with such deviations, as long as we keep each other in the loop! Gonna stay clean and fast to the marker because we're late? Okay- lemme know and prebrief it so that I don't get nervous. Want to climb out at 200 knots to 10000' because of low level level windshear or the fact we're flying in the wrong direction? Let me know that too.

When you're flying an approach that's on the ragged edge of stablity (at least per the book), let the other guy know that you know things aren't quite normal, but you have it under control. For example, as simple statement like- "I'm a bit high and fast right now, but I'll have it stabilized and spooled by 1000 AGL (or 500 AGL, whichever your company uses), or we'll go around" can alleviate a lot of stress the other guy might be having about your approach.

Finally, don't consider post flight debriefs as a bad thing. Any time I flew as an FO, I always appreciated things captains told me that I could improve upon (and often asked for suggestions about technique). As a captain, I try to find at least one or two things that I can offer suggestions about (in a friendly and mentoring manner of course).