I would lower the seatpost and level off the saddle and it looks like it it should be further back on the post. Those wheels are super stiff so if you have an extra set of non deep dish wheels, or swap with a buddy and try that. 100mm stem on a 49cm frame sounds a little long, so all your height is over the front end of the bike. Did you measure this bike up to the cockpit of the old bike for comparison, that can help if your build is off in relation to the old bike.