Do you plan on implementing TaPoS later in a different system; maybe some DAC, PTS/AGS or even an altcoin? It would be a shame if this goes unused.
If you later transform PTS (and maybe AGS too) into a TaPoS currency with fast blocktimes (30 sec?), it can be used as a viable currency, which actually has some inherent value (instead of just speculative value). Of course, snapshots decrease the value, but after a certain time we would expect there will DACs being launched left, right and center and so price variation will be less bumpy (besides if you 'hoard' PTS you will get the new DACs anyways and so will not actually lose money).
When Nxt exchange starts working it will be interesting to see if they face any challenges regarding transparent forging. If I understand correctly, Bitshares Me would be a somewhat similar (at least a direct competitor).