I would suggest maybe redistributing a day from Wicklow to Cork.
Other places worth seeing in Wicklow include the military road from Dublin (Rathfarnham/Rockbrook) to Sally Gap (the pass and junction on the road between Glencree and Glendalough), Lough Bray, Lough Tay and Lough Dan, and the road from Sally Gap south to Glendalough via Glenmacnass. You could see all of these places with one day's driving, but there are also many walks you can do.
Some of the more pleasant walks would include, in increasing order of difficulty (but none of these are really difficult):
-a stroll around Upper and/or Lower Lough Bray (the latter is only five minutes from the road, but you can take your time)
-Powerscourt Gardens are very scenic, especially if stately gardens are your thing
-The Great Sugarloaf is a much easier walk than it looks, an hour and a half or so from the car park to the peak and back, but the last bit is a steep scramble over gravel.
-You can walk down to Lough Dan from one of the car parks on the road between Sally Gap and Glendalough - pass through the dates and follow the signposted road. A pleasant walk and it's nice down by the lake, but having to do the last uphill stretch right at the end is less fun. About 2 hours walking. If you're feeling adventurous you can easily extend it by climbing one of the nearby hills - Luggala is recommended, but do stay away from the cliffs over Lough Tay!
-From the same car parks, you can reach the peak of Djouce following the boardwalk on the Wicklow Way. Excellent views on a clear day, including sea views. About two hours.
-More adventurous still - climb Tonlegee either from the road between Sallygap and Glenmacnass waterfall (don't cross the river near the waterfall as this is dangerous) or from the other side. Excellent views from here as well but very rough and boggy ground.
If you're going off paths and away from the road, e.g. if you climb Tonlegee or Luggala or walk onto the higher ground around Glendalough (where there are steep and dangerous cliffs overlooking the Upper Lake that you need to be aware of and stay away from), you should have a map and compass and know how to use them, as the weather is very changeable and visibility can be very suddenly reduced. In any case, you should get the Ordnance Survey Discovery Series map no. 56 (I think) which covers the relevant areas of Wicklow.