Not everyone is happy with AFLX, it seems.

Brisbane Lions coach Chris Fagan says the concept doesn't engage fans and has already suggested rule changes after the abbreviated form's debut in Adelaide on Thursday night.

But what Fagan fears most is his Lions players getting injured as "guinea pigs" in an experimental game.

Coaches, players and fans appeared to lap up the new format unveiled for the first time at Coopers Stadium, with Adelaide downing Geelong by eight points in the inaugural final.