Wake feels like it'll make already existing Sun teams better. We might see a slight rise in usage, but it's a good standalone Pokemon.I don't like to get snippy with subjects like this normally, but I can't seriously ignore someone calling the one-mon Baton Pass Chain "well designed". Espathra's design is to snowball by doing nothing/boost spamming if provided a free action, which good or bad at the job, makes its playstyle an inherent match-up fish much moreso than an expression of player skill and ability. Whether or not Espathra were broken, I would never call it well-designed (in a Single Battle Context at least) for the reasons above. Tera made it better at abusing a playstyle it was already cancerous at, like throwing a rock at a guy who fell off a cliff already: it makes things worse but the biggest problems clearly started beforehand.
On a different topic, do you think that beyond the new toy fad, Walking Wake will make Sun Teams more common, or just make the ones people already play significantly better? It certainly improves the playstyle significantly in ways such as adding a fast Wallbreaker and a rain check effortlessly, but it also basically NEEDS Sun in order to be particularly notable, with the playstyle being stronger but not strictly diversified by its addition as an offensive juggernaut.