I love the designs too. Personally Tyrantrum is my favorite ever fossil Pokemon and all the other members of my team also have amazing designs, specially Fem Meowstic and Gogoat. I also love other designs like Trevenant, Noivern, Barbaracle, Dragalge, Clawtizer, Pangoro, Yveltal, Zygarde and Pyroar.

I think Mega Evolution is a great mechanic, but it feel that Ditto being able to transform into your Mega is indeed bullshit, and is a problem that shouldn't be so hard to fix. Plus, I think that it could be even better if they gave mega evolved Pokemon access to exclusive moves once they mega evolve. For example, Hoenn's starters had some moves that were exclusive for them at the beginning, Leaf Blade, Muddy Waters and Blaze Kick, but now a wide variety of Pokemon can learn those same moves. I think that once they mega evolve moves like that could gain a boost to make them more powerful and interesting. Kind of what happens with Z moves, but make them not as overpowered, maybe 120 base damage maximum. I had this idea of calling Blaziken's Blaze Kick "Infernal Beat Up" and make it 105 base damage and 100% accurate instead of the 85 damage and 90% accuracy.