It's unequivocally terrible. Inflexibility is about the only thing in a gunboat that can be categorically stated to be bad in terms of early strategy. There's this gunboat mentality of picking an enemy and going all-out... I don't like it, but it's generally understandable to an extent. The idea is that you hope that, by making a strong and surprising move on a neighbor, your other neighbor will join you in beating your target down.
The problem in my view is that it gives the power to decide how to proceed to a third power instead of keeping it for yourself. It can work, but the downside is that if you get burned by the kingmaker, then you have to try to reconcile with the neighbor. You must be flexible enough to admit fault and make up with the target.
Frankly, given his often self-righteous press, insulting arrogance on the forum, and complete inability to accept any fault whatsoever in any EOG type statements ever, I think SplitDiplomat is incapable of accepting that he made a wrong decision in-game. This leads him to pursue this aggressive strategy to the complete destruction of his target or himself, always believing his move was right, and always unable to see where it is not.
Maybe that's too harsh, but he's rather pissed me off multiple times with his sheer inability to accept fault. I don't mind stating my views bluntly here.