Personally, I think part of the challenge and appeal of Reborn comes from the lack of decent TMs. If we get stuff like Earthquake and Thunderbolt, then we could just slap them onto our Pokémon with reckless abandon and never have to worry about decent STAB and coverage moves ever again. If someone wants good movesets for their Pokémon, then they'll have to take the time and effort to breed for them. If you work hard, then you'll be rewarded accordingly for it.