Lost isles is still my favorite zone, so idk what you're upset about =(
As for the prof thing I've went from ranger and am very slowly/quickly (slowly leveling an build up wise, quickly liking wise) making my engi into my main.... I normally hate the sort of thing engi is... But for some reason I'm enjoying everything about it and unlike rangers where I don't even want to touch a good amount of the skills I have my engi doesn't have enough skill slots for me...
That being said I suggest you try out another prof, maybe mesmers just not what you wanted?
PS: I love my Mesmer, but in PvE I can't hear the laments of the enemies women and collect the enemies tears in a jar so it's not as much fun, and then in sPvP it's portal or gtfo =(