There are a lot of interesting jungle options right now, it's just all of those interesting options are in the summoner spell smite. IMO it makes the jungle options more interesting because they don't have to be 1 person's options they get to be a whole team's if they so choose. The different smite buffs in the jungle have actually made me enjoy jungling (the one role I hate because I'd rather sit there and farm or better yet tactically harass you as a support than have to gank you) and have made me enjoy the jungle even when I'm not jungling. On blue side I've been going supports with MS boost abilities (lulu, nami, zilean, karma) and smiting the enemy Gromps/Blue for the smite rewards (not even trying to kill the camp). As a jungler I really get to think about my jungle path, which camps I want to smite at different points and which I don't. Late game as a support I'm always trying to figure out when I can smite enemy wolves/raptors and when our wolves/raptors are up as well to see if I can gain us that extra vision. The vision wars is one of the best parts of the game, I believe, and this new jungle allows people who enjoy those wars to play a bigger part in it.
The chess match is now, are you counterjungling to take the camp or to get the smite buff? What do you need to deny them of? Can you do it safely? It's a lot more than just 'Oh look X champion is blue dependent, let me invade their blue'. Smite has also been taken in top, bot, and jungle during 4.20 games making it a more versatile spell.
I honestly thought counterjungling anything but a buff pre-season 4.20 was the stupidest waste of time. Honestly if the camp is back up in less than a minute I'm sure it's actually not going to be gone when they get back to it. Maybe you can name a jungler, but I can't think of one who can really travel between camps and clear them all in under 1minute. Mostly because you just don't walk that fast. (Unless you're Rek'Sai and then, oh well sucks to be you). Counter jungling actually means more when there's a longer downtime between camps.