It's a shame and I wish I could move up my suspend date. I don't think I could last till June with this nonsense.
Sorry, you have to go through this nonsense. The way I see it, the transition work or tasks will be coming from elsewhere, probably not your former leader or he has no knowledge of what tasks are coming your way, the good thing is, you know when is the end date.
If I were in your place, I would just do the task somebody would ask you to do, and rest of the time I would utilize to import skill, if you are technical things like VCP they will be still valued as more and more customers will now be evaluating there options, some even to migrate away from existing vSphere/VMWare products.
if you are a non technical person, something relevant to your field or anything else that you would be looking to work on, use tools like linked'n learning or Pluralsight. Add all the badges earned to your linked in profile, look through existing job posted and identify what they are asking and learn the once you don't know already.
When the time come take the bonus + severance and be ready to hit the ground after a quick well deserved break.