If people were objective, they'd agree that
-a- Abate is not very good with headers
-b- Abate is not good when attacking and especially making accurate crosses
-c- Abate is solid at defending, leaving aside a couple of flukes with Milito he's done a good job most of the time.
-d- In the past two years, Abate has had a lot of problems with injury and has played about 2000 min per year, so roughly half the total minutes. In other words, if that's the same story next season, we'll need another right fullback.
Personally, when it comes to defending, I'd take Abate over Lichsteiner any day of the week. Glad he renewed assuming that his salary was less than 3 mill a year...