Triple crit in 8.10 will cost 9300 gold instead of 8600.
However, it will be more powerful in most situations. You will have +80 ad instead of +70, 120% crit chance instead of 80%, and your crits will do more damage to targets with more than 125 armour. I don't know how I feel about this.
I noticed that the true damage was going down with every hit as the target dummy got lower, which seemed to imply that botrk's damage was being effected by the true damage conversion like it would with conqueror.