really, didn't know that ....
Anyway, her ability is what makes people so fond of her. Never been able to use that ability.
Her energy attack is definitely a good back up but her HP is so low she gets one shotted by anything I've come across so far.
Seeing a deck that doesn't deal +200 damage on single hits, has been very rare for me with sun and moon.
The only decks that don't one shot you either kill you while on your bench or stun you just to 2 shot you.
Then of course decks like mine that makes you waste energy over and over just to do a single attack. Especially when it comes to special energy like double colorless. Tbh I haven't even seen a single person use tapu lele's attacks against me. They mostly play her, get a supporter and it sits on the bench just like what Shaymin is/used to be.
Then you got her GX attack, while great and all, you mostly have another GX pkmn's GX move that you prefer to use. Most likely one on which your deck is based.
Tapu lele is just that extra basic pokemon with which you don't want to start your match.