Yep, should be good, it's going to be a whole new ball game.....inside the original ball game!!
A bit like the Lightweight, UltraLightweight & Singles TT all rolled into 1! 

Interestingly, about tyres, regs state - 250cc all single cylinder 4 stroke machines ridden in the Lightweight Race may use slick tyres. 
Other classes may only use tyres having a moulded tread pattern

presumably they've missed an '&' out?