ever since January, where we hit a low, the transactions per day have never been as high as they are now.
the number of unique addresses used is ~30% up from december 2013
miners are struggling making a profit with these prices (so difficulty is lagging behind)
why is the price lagging behind so much?
it has every reason to rise, and yet is doesn't.
There are a lot of factors that needs to be positive first before the price moves upward. Like you, I am also wondering what is the reason why the prices aren't up when there are a lot of positive things happening around bitcoin.

more sellers than buyers...that's really the simple reason. We can all speculate on why people are selling more than buying, such as recessionary times require people to cash in their savings, or perhaps other investments are more attractive, or perhaps there's been huge liquidation that hasn't been made public.
Transaction volume is good for the "survive-ability" of Bitcoin. The more transactions that happen, the more people are using it...and a successful currency needs people to use it!
also the miner, which dump every day, when the block will halved, the buyers pressure will become stronger for sure, indirectly at least