well, you're riding seems to be bugging you... so you want to improve that... however...
central park has no real 'technical sections', it's all about matching your strengths and improving weaknesses (as always is the case).
you will likely be able to 'power' up short rises, where someone with less peak power (small woman) might not be able to 'power' as much - longterm climbing is a completely differnt thing...
smaller rider profile means aero advantage is greater than greater mass on short, gradual downhills, also advantage aero on flats...
you did say you are 190 lbs plus...
I expect that there's some to lose. I would also expect all else remaining the same, 175-180 lbs would make an appreciable difference in your riding capabilities and pace...
Ride On
Yuri
Dropping your chain - could use some attention. check the FD settings. also if you're FD is a mismatch to the chain width (9 or 8 spd FD being used for 10 & 11 speed?).
Older FD work well, but even when used with their appropos older systems, they were often too wide cage (unless durace or Suntour Superbe/Cyclone) and would allow chain drop.
The new FDs with new shifters/drivetrain/cranks) rarely drop chain unless their mal-adjusted.
If you drink from your water bottle from the very side of your mouth, tipping bottle by side of head - you can be in the drops and still be pedaling... LOL!
an HRM can teach you many things... strap heart monitor is cheap and eassy, like Kickr , mated to your cell or whatever bar mounted meter... recommend