I actually think the whole raise in stipend is good, but has some unforseen negative consequences, especially since it was so abrupt.
1) As hard as it was to find quality rabbeim, both in town and out, it will harder, since a major impetus for leaving kollel is money.
2) Out of town kollelim will have a harder time recruiting since their major draw is higher pay. Many small communities have very little jewishness outside of their small community kollel
3) Yungeleit will spend more time in kollel, since they are getting paid more. However when it comes time to leave, they'll be in a tougher spot since the starting salary will be a smaller raise, and their expenses will be higher, becauset they stayed in kollel longer. (I agree that this is a weaker point and doesn't inherently make the initiative a bad one).
If anyone is going to spearhead a raise in pay for BMG they must be ready to address rabbiem salaries and out of of town kollel stipends in a similar fashion, IMHO.