We (2 adults) will be in Panama in a couple of weeks and i am trying to finalize Panama City activities:
1. we will arrive in PC at international ariport at 1pm. I figured by the time we're done with immigration and get to the hotel, check in and refresh, it will be 5ish. Is there an interesting and safe place to experience PC after dusk/dark or is this eve waisted (from the touristy point of view)

days 2, 3 and 4 are in sequence

2. we will be back in PC, 2:35pm arrival at the local airport (assuming the domestic flight is on time). I figured we're back at the hotel by ~4pm. Could i do the Canal and Miraflores locks - the museum closes at 5pm, but the restaurant is open, so we can park ourselfs there and watch the ships go by. will we see ships that late in the day/early in eve? Or should we do something else?
3. Full day in PC - we'll do the old city/new city and Amador with break for lunch.
4. 8am to noon - do the Cerro Ancon, hill the YMCA market and may be Mi Pueblito. Is it doable?

Would you change/re-arrange activities? What am I missing - will I get the sense of Panama City by carving out a few hours here and there? Pls advice and comment - thanks in advance!