absolutely it would be suitable for a 'mainstream fan'!
it seems nowadays that bloodstock has tamed a little, and is what download used to be in the 00s, download is what reading used to be in the 00s, reading is what v festival used to be. it's like there's been a shift in appeal. bloodstock gets the balance right i think, i have a lot of friends who go who are really casually into the genre and some friends who live and breathe metal.
what kind of music do you like? in terms of independent festivals you have so many options - you could do damnation this november as an all-dayer, outbreak in june, would you be open to travelling abroad?