Without a doubt, it has a lot of untapped potential, I would like that the people from Boruto to give it a little more spotligh to it.

it's good

Naruto was pretty weak in the beginning of shippuden so when he learned sage mode i was happy

True but it came around

Sick

This is my favourite design wise and I liked the fact that Naruto used his clones for reserve power in case he reach the limit. I think that’s genuis.

I like the aspect of each sage mode having its own sacred technique like frog kumite to bad it wasn’t explored as much with other modes

True. I’m curious with the Slug sage mode. I wonder how’d that look like.

It is implied that Hashirama's sage mode is the slug sage mode. Either that or Hashirama somehow discovered sage mode on his own.

I’m pretty sure hashirama discovered it by himself since he has no connection with the slugs