The thing about Marvel Scale is that the defense boost tends to merely cushion the blow of the status, rather than actually making up for it enough that Milotic or whoever would switch into status with glee.
Anyway, a quick look at the ability list was as disappointing as expected. Defensive abilities are just not that creative compared to the other ones. They are generic rewards like Intimidate and Poison Heal (which I doubt anyone wants) and/or weather-dependent like Rain Dish and Hydration. Clear Body, Mold Breaker and Rough Skin kind of make sense, Clear Body mainly to eliminate Intimidate users as counters to physical sets, Mold Breaker so that we don't have to tiptoe around Heatran, and Rough Skin so that the lack of Weak Armour is made up for by incremental damage. None of them seem all that compelling, though. In the "alternate Speed boost" department, we have Quick Feet, Rattled, Steadfast and Unburden. Rattled and Steadfast are far too situational, and Unburden is too much of a one-shot pony for my taste. So I guess Quick Feet could work, but I fear it may be too similar to Weak Armour to be worth pursuing.