elephantcastle

If you take a look at the more recent hires at Oxford (especially CP) and what they specialize in/where they received their training/their prior institutions, the US/UK dichotomy in terms of methods is much more blurred now; academics move around. There are also new centers dedicated to formal/causal/etc. and a lot of funding is poured into that area. It's true that one would probably need to take more initiative to seek out methods training and there tends to be a reputation lag, but the quality of such training is respectable. Oxbridge has also traditionally been very strong in political theory/philosophy, so it also depends on the subfield.

I was in an MPhil program in Politics/IR at Oxbridge. Methods training has been improving since the department has recruited quant-focused people onto its faculty, so I wouldn't dismiss these programs as methodologically-weak. The reputation and competitiveness of the degree vary by the program. Graduates have gone on to top American PhD programs. Whether or not it's worth it is a nuanced question. This is all I am comfortable with saying publicly, DM me if you want specific advice.