Personally, and I have no crystal ball here, I think AIB will have to make a move downwards on interest rates shortly to remain competitive. Possibly before end if March as their market share is below their target.
There is plenty of competition to hold short term rates low for another while, so there is no rush to fix. Margins will tighten a bit more, before market rate rises have any impact on customer rates.
I would expect AIB to reduce their variable rates across the board, and match their EBS fixed rates as a minimum.
This is just my opinion.