In my opinion, diluting is always the better choice. [...] answered your questions, which you understand and seem to agree by your replies. Don't allow unnecessary comments and/or drama confuse you.
Effexor is a stimulating A/D, it is good you've tapered off it, albeit a bit too quickly.
If it were me, I would slowly taper the Ativan and hold the diazepam steady. Once that is tapered, then tackle the diazepam slowly.
Please do listen to your body, you're still dealing with the Effexor withdrawal.
Wanting off is terrific, being off and healthy is an even better outcome.