No I don't regret anything at this point. That may change on the next phone call but at the moment I don't regret anything.
I think of doing a series as very hard work. But then I've talked to coal...
You do have to change things as warfare changes.
Over the eons I've been a fan of and sucker for each latest automated system to 'simplify' and 'bring order to' my life. Very early on this led me to the beautiful-and-doomed Lotus Agenda for my DOS computers and Actioneer for the early Palm.