That's actually a fairly tame description of Mr Prince, compared to some I've read. What part do you feel to be inaccurate?
For an insight into his current thinking on business opportunities, have a read of this re: how to engage ISIL.
http://time.com/3490414/isis-isil-blackwater/
If the old Blackwater team were still together, I have high confidence that a multi-brigade-size unit of veteran American contractors or a multi-national force could be rapidly assembled and deployed to be that necessary ground combat team.
Not a lot of regret expressed there.
Praetorian Guard is a reasonably accurate description for his former organisation's activities; administration, special forces and covert intel ops directed from a higher level than the bread-and-butter army.