guinsoo rageblade on yi a bug?

Ok so i love yi and when i play yi i spam the ability of Rageblade, here a thing i dont understand if this is a bug or if it meant to be a thing for Yi passive double tap seem to go well with two things, itself and rageblade, when double tap hits the passive counting as one and rageblade counting as two when you aa procing it off faster then any other champion in the game, and that not including hydra that counts as a aa reset. now with ideal it breaks the amount dps yi can have in fact his cap would rather look like 3.0 almost. i was thinking that what your guys plan for dps yi. which i like and love dearly but make me confuse, people claim it to not be good on yi. in fact crit aparently is claim to be better for ALL yi players, and the only thing 2 things that make it good on yi is the extra burst damage from when crit happens (if full crit). but that it, sustain is low as damage is high and his q will come up quicker which yi dont need. Yi with rageblade can remove up to 3 seconds per second when he aa at full stack, still calling it week? then answer this, with the addition of runes masteries and a build that goes like this ( or or ) now with this build and the usual rune path that will give 13.5% attack speed runes and 4% more attack speed (total 17.5%) and rageblade with ult, you get max stack from all that. so while crit has that burst 1-3 shots the other is 1-2 cause the % max hp damage % current hp damage, true damage and mobility and all that with a huge amount of sustain damage. so i was curious if this is a bug or not