Vote which of these you would want to try out in DP. If you're going to state why it'd be good if you didn't start at the very beginning again or bring up pointless things like Faint Attack, Swift or "Wobbuffet can be countered with Gardevoir and Porygon2". I included a BPless Double Team option because that is what I like. :]
Anyway, I voted Double Team sans Baton Pass and OHKO. OHKOs are mostly on dumb Pokemon except for things like Lapras and Articuno, both of which will be Stealth Rock nerfed to hell. It's also going to miss nearly all the freaking time while you could've been doing something else. Double Team without Baton Pass, as pointed out by Hipmonlee's thread, is simply not going to work because it hurts your versatility, power or stability too much to be really effective.
Wobbuffet, however, seems to overcentralize the metagame too much.
Anyway, I voted Double Team sans Baton Pass and OHKO. OHKOs are mostly on dumb Pokemon except for things like Lapras and Articuno, both of which will be Stealth Rock nerfed to hell. It's also going to miss nearly all the freaking time while you could've been doing something else. Double Team without Baton Pass, as pointed out by Hipmonlee's thread, is simply not going to work because it hurts your versatility, power or stability too much to be really effective.
Wobbuffet, however, seems to overcentralize the metagame too much.