The original title is less precise, but it's not even remotely inaccurate or even "vague" by any reasonable definition of the term.

If you want to know about the future of Theano, that tells you about it.

If a title is misleading clickbait, then sure, fix it. But if you're making subjective judgment calls about whether you think the level of imprecision is appropriate or not, and so on, that's way over the line.

Again, the original title is 100% appropriate for the post, because it describes exactly what the post lays out. It may not be as precise as you personally want it, but this is how the author chose to package it and that should be respected.