Its been my experience that once the floating system is explained people are generally surprised and relieved. Surprised about the number of blocks required and relieved that that they did not build wrong.
To answer your questions -
1. We do not have plans for your particular deck but we do have plans for a 21x42 pool deck that you can modify for your needs. You will need to add some extra material to frames in order to use the 5/4 cedar decking. The following link will take you to that plan.
forums.deckplans.com/plans/PSW21X42L3.pdf
2. don't bury the piers. Burying the piers can lead to frost damage to your deck.
3. Never build with post and beam construction using the blocks. This can concentrate to much weight on one block causing it sink. These decks have also been reported to be wobbly. Also, it can be hard to get a building permit using this building method.
4. Never build with post and beam construction using the blocks.
5. Follow our building instructions the best you can. Put the frame of the deck right on top of the posts. You should never have big problems with frost heave. the deck will rise and settle with the frost but always end up in the same spot every summer.
6. This information is in the plans and instructions.
7. We don't recommend putting the decking over the top of the pool.
8. yes
Deckman