While Chevy may have lost most of Colt and Allisons design before Hills got there, I have to say I absolutely think it has that classic feel. maybe its just the feel of the whole club, not just the course. i think hills put some of the best and hardest putting complexes i've ever seen on chevy, and while i did not play the course before hills did his work, i did caddy there for about three years while in college. beleive me, i am a philly guy, i love flynn, i love all of his philly classics, having never seen manor i can not comment, but being at chevy for a while, i can tell you that the work that was done was viewed in a positive manor.
i can also sympathize with you for fearing the modernization, the club i belong to just went through a huge renovation/modernization by bobby weed and i was more worried about it than anyone, and i still am worried about it. good luck with your work and i hope that everything does work out ok. one thing to look forward to though is if your club does close, the reciprocal benefits for a year are something you should def. take advantage of.