Complex sentence: That is advocated also by the fact that with the limited functions counties can do, 10 of them isn't needed for Lithuania, also another arguement is that in other countries historical territories are being revived, while in Lithuania artificially made counties exist.
Split into simpler sentences: That is advocated also by the fact that with the limited functions of counties, 10 of them is not needed for Lithuania. Another argument is that in other countries historical territories are being revived, while in Lithuania artificially made counties exist.