Yes... The miniBrute can control any other Synth as a controller, Rack, Key, Desktop, or Modular. If it accepts a signal the MiniBrute can send it.
Yes once connected your arp should send notes to the other synths on the channel... as well.
Thats where the Yeses stop
No. (I and others have tried) lol.... you cant use the knobs on the MiniBrute to send CC info to assign them to another VST or Desktop Synth but you can use SysEx to send over commands like we used to back in the olden 70's and 80's.... um and 90's... hmmm... we still are doing it somewhat today but just only us geezers and geeks (typically)... lol
CHeck Out Yves (the designer) site
http://hackabrute.yusynth.net/index_en.php for the ins and outs and for a what the synth can and can't do. You can even send a message with a question. Explore your options "Explore the space". I will never sell my Rev 1. Its Arturias Minimoog and it stands alone.
I hope this helps a lil
SNO King