Hi
We got back from the Tucan in April and it is an absolutely wonderful hotel. We just had a standard room and although booked into the Tucan with First Choice we weren't happy with our room allocation and were changed without a problem to a room on the Quetzal side. The two hotels are one and the same and it doesn't matter which you are staying in, all the facilities are shared.
We had two adults and two kids in a standard room and it was fine- two double beds. We certainly didn't feel like we were falling over each other. The only way to get a proper sea view would be to upgrade, but it does seem to be a very popular hotel, so I guess being able to do it would be down to luck on the day. We were in room 2125, first floor near the pool and you could look across the dive building and over the pool to the sea- it was lovely. Also only a stones throw to put our towels out in the morning!! From what I've read upgrades seem to go to returning guests, but I know of people who have requested a specific standard room by emailing the hotel and got their request.
The reception staff are very helpful, so if you don't get sorted before you go, see what you can do when you get there.
Have fun though, you won't be disappointed
Pam