User blog comment:Pianodud777/A Champion that can do it all?/@comment-5763148-20130710071723

Th problem with these Champs that can go any lane and do any given/needed roles are that the majority of them are gear dependant literally. They all tend to have more drawbacks too or just don't have a specfic niche for certain roles. Someone here mentioned Kayle as an example.

Basically, Kayle can do every role in the game that is needed cos her Kit allows her to do them. But while Kayle can do every role in the game, there are several things which hinder her performance. For example, her statistics are well rounded but there is no skew. Meaning, she needs to get geared before she can actually do a proper job on the role she is undertaking. Another problem is that this very well rounded statistic hampers her performance in that she can't do her given role to her fullest unlike other Champs who were made to specialise in that role. She needs more gears to do it upto needed standard.

If I was to build an ADC at Top Lane like Tryndamere or Master Yi, u can expect me to do really well in Split Pushin or a 1v5 scenario. Kayle can do them as well but she needs to get geared first and she doesn't have as much raw, destructive power like those 2, even if u build her as a genuine ADC.

This applies to every other lane Kayle goes to and even in the Jungle. But the good thing about these 'Omnipotent' Champions are that, what they lack unlike more generic Champs, they have access to methods which can only be done on other roles. Go at Top or Mid, Kayle can not only apply CC to enemy Champions to augment the given ganks, but can speed up allies who are there to assist her. Go Bot lane, Kayle can consistently stabilise the lane when the ADC is back at base so it won't be pushed towards either towers. Go to the Jungle, she is the only Ranged Champion that is viable in the Jungle right now and since Kayle can make use of pretty much ANY item the game has to offer, she can take an economical build set up and still do solidly as a Jungler unlike other more slightly gear intensive Champions.

Oh and to your Post's question, there are approcimately 20 Champions in the league that can go any lane and Jungle. The problem is that each metagame shifts make certain roles on certain Champions less viable as the game's tastes change. U can see that TF used to be a decent ADC back in Seasons 1 and 2 but now he is plain crap there.