Ive litterally seen a million ppl saying theyre league starting this..now Mathil is

Cause mathil showcased them during the league and loved them would be my guess.

require alt quality gems and fairly rare unique to be useful late game - end game - so not ideal for SSF

I've not seen anyone else talking about them at this point though, even tantial (sp) the totem guy isnt really talking about them much

Easy answer, you can get them strong enough to kill all but uber bosses on day 1 of league.
I will use them to afford to ConPath totems for the league mechanic.