The point of testnet is to test, difficulty being low is a good thing.
Now the diff on testnet is [too] high, since few 5970's where put on it for an hour or so
and otherwise mostly just CPUs are there.
Or we could do something cool with testnet.. like...
adjust is to 1 block per 1 hour - sutiable for crytponets (like freenet) high latency mining
limit max diff there to say 100 (so we WILL have inflation there)
... and/or make is so that older coins are worth more?
or other idea so that even with huge diff changes the generation speed will remain the same?
e.g. keep difficulty at say 10, and adjust not the diff but the 50.00 BTC reward.
or just keep it at diff 10 and it will quite soon reach the point when it is 25.. then 12 ...
and later move on to TX only version?
and so on
ofc all ruls should apply say starting with 2012.01.01 so that everyone had time to update clients to agree on thoes rules.
also would be nice to keep already done transactions as they are for people bravely investing into TBTC now