[TheGentleman]

While all these ideas are interesting I don't think that I like any of these changes.

Void Siphon: The idea of stealing minerals is quaint but I'm not sure how it will balance. To me it naturally feels quirky although it would be interesting in PvP as a way to deny forward pylons.

The Mothership Core is gradually turning into a protoss Queen with more offensive capabilities. Wouldn't it just be better to have a second lot of abilities on a nexus which share cooldowns or use a secondary "shared energy" source.

As for the widow mine... I don't like this change. It's a landmine that gives away its position.

In saying this I havn't beta tested these changes yet, these are just my initial impressions.