Earlier quoted context omitted.
I'd say you have it backward. Tactically, mistakes were made. But strategically this mission was a huge success: they eliminated their target-- the goal of the whole operation.
Considering all the details about their own operations that were leaked, I bet they wish they had spent more time to get it perfect. It's not like Israel is incapable of perfect assassinations. It's just a question of dedicating enough resources - time, money, manpower. This has not only exposed agents and caused a diplomatic mess, it has exposed operational details: - the hacking of hotels - the use of disguises and…
As for political fallout... what political fallout? They got some bad press on the evening news but do you think they actually give a damn about that? Other countries sent a political message scolded them for using fake passports, and they sent a pretty clear political message: that they are willing to kill anyone they don't like, and no amount of cameras will stop them.
I really have a hard time seeing the people who planned this doing anything other than patting themselves on the back for a job well done.