I am always very keen to improve our toolset. So if you find any tool that fits your needs well, feel free to propose that we start using it.
Ideally, it would be possible to link work done in this tool in the Wiki side by side with the respective articles, so that we could maintain our ethos of 100% transparency, open source and replicability/auditability.
In the end, what always wins are feasible insights though. So if there is indeed a tool that can detect correlations between possibly thousands of time series and preferably can be fed automatically I would be very interested in it as google sheets will have its limits.