I actually agree and bought some shares today. Have done the same with other takeovers - all other three were utilities and two of them have not closed out yet. looks like easy money especially for an investment in a retirement account as long as the takeover does not fall apart.
My DYAX shares are in a taxable account and have owned DYAX since 2006 - very happy with the outcome.
We should all watch the use of 10 billion loan proceeds very closely. In the second quarter of 2015 there was a use of funds of about 3.5 billion to buy back warrants. Very little noted in the quarterly 10Q about this transaction and who were the warrant holders. I sure hope there is not a transaction like the above in the third quarter.