Ilshenar is a pretty big area, but I think it is good for there to be no gate/no recall areas in the game, for interest & variety.
Having said that, the problem is Ilshenar needs updated content, and special incentive to "bother" to go there. The dungeons and some of the creatures & special areas such as the gypsy camps, and other "attackable" NPC villages in Ilsh are interesting but there really isn't much to DO there, which is pretty much a problem throughout the game. (The puzzles around Blackthorn's Castle are neat - I wish there were more things like that around, but ironically they made the spawn so intense in that whole area - on Siege at least - good luck getting to the puzzles to play them, and with the paragon efreets that always seem to camp the entrance to the passage to get to that area, even funnier if your char is not a tamer or other PvM optimized type). The paragons really were not the content Ilsh needed IMO. The areas where the champ spawns run 24/7 and barf them out constantly are plain annoying.
-Skylark