New "fun" mode with specific champions/items only

Hello,

I just submit an idea of "fun" mode where available champions would be restricted to some conditions. Examples of conditions:

1. Season 1 champions only or any other time limit.
2. Adc only or any other type of champion like tank only, ap carry only, etc.
3. Offensive items only or other type of items. Also combinations of these conditions could be possible.

In the first place I thought about a "fun" mode where we could play on some specific old patches to remember the old days, for example playing on a season 2 patch but I am not sure it is easy to design in practice or even feasible. This is why I propose easier versions of this idea like above.

But are these good ideas or is it "fun" only in my head ?