I think the defensive and baserunning differences are stark. O'Neill is just not a guy I'd trade very easily. Consider our outfield to be Peter right now and find a Paul that won't steal from it.
I mentioned Drew Jackson as a possible headliner in the previous trade post but if DJ has the value required I'm kind of ok with that too. It would be nice to see DJ and Tank both playing for spots next spring but if Lee is brought back there won't be as much room for DJ. Him fitting would then require Cruz in the outfield some which isn't horrible in doses but lessens the defensive improvement. I'm more hopeful to see a Heredia/Martin/Tank outfield sometime next year than DJ over Lee or both together.
With Karns and Monty (Good point, Jemanji) LeBlanc, etc. acquiring SP seems to be a reaction to injuries that shouldn't be long term anyway. Felix, Kuma, Walker, Paxton, Miley, Karns, MiMo, LeBlanc...do we need to add there? I do like the idea of Teheran but the need is more like a couple weeks to get Walker and Felix back then we'd be truly overstocked in the rotation. I like 8 options that we have at that point, considering Diaz in there. Except without him in the pen we're 2+ arms short there. I think the focus should be on adding 1 or 2 of the right arms to the pen and roll with what you've got otherwise.
Kuma to the pen sounded good at first but he's been probably the best starter on the year. Deep consideration on most of the starters doesn't make much sense to move them to the bullpen. Maybe Paxton once Felix and Walker are back, though I hate the idea. Paxton, Diaz, Cishek + an acquisition for the back end could transform the bullpen into a plus at which point OF defense is my biggest concern.