Difficulty and grind isn't the issue with VG. The problem is the game, despite the potential is thrown out the door early due to Sigil's piss poor managment of their IP. For a game thats been in development this long to be this buggy and incomplete is simply unforgiveable.
From the level 1-20 the game is ok but after that the content begins to take a giant dive. The Vision? They still have no idea where they want most of the classes to be as of the latest patch. Some are uber as hell while others are gimped to uselessness.
Don't even get me started on the performance and bugs. Assuming those issues are taken care off by the best patch ever, the lack of high and mid-level content along with balancing concerns are too large to ignore.
Stay away for a year or two. If Sigil can keep the game afloat this should be the best mmmorpg ever.