Ultimately, it would in my opinion be a violation of the Treaty (in spirit, at least, which I view to be the more important lens) to terminate it for a cause which isn't allowed for by the Treaty. (I would oppose withdrawing from any treaty without cause, even given a withdrawal without cause with notice clause).
We actually do have a withdrawal without treaty violation with notice clause, it's 4.2. 4.1 only applies to
immediate termination, so treaty violations are only grounds for
immediate withdrawal. Either signatory can withdraw for any reason with seven days notice, according to 4.2.
At least, that's how I read it and how I believe it was intended, but the wording is ambiguous.
"Without cause" is not the same thing as "without a cause which isn't allowed for by the treaty." We could still have cause even if it isn't allowed for by the treaty, and this would not be a violation of either the letter or the spirit of the treaty if there is a clause permitting withdrawal with notice for any reason. I'm very uncomfortable with making our diplomatic dealings, which should be our sovereign decisions, explicit grounds for the other signatory to accuse
us of violating the treaty and terminating it.
I also don't support CoS's proposed language. The clause shouldn't be there at all; our diplomatic decisions are our own and I'm not going to knowingly vote for a treaty that cedes Taijitu's sovereignty to Lazarus or anyone else for no good reason.