I agree on nearly all fronts here. I do think that when Dave Hunt left the book at issue 170, the inking suffered some. Namely, I think without the third inker, the primary inker had to less time to do a great job. The detail that came with Dave's backgrounds is not small. Look at the ASM 151 incinerator as compared to the same incinerator in issue 180. Day and night.
I also did not enjoy the cover to ASM 137. The cover to ASM 136 was amazing, the cover to ASM 137, the opposite.
Generally, I did like Giacoia's inks better than Mike Esposito over Andru's pencils, but look at issue 161 for a great example of where Mike did a tremendous job.