Unless you work for a unicorn manufacturer, proper life assurance will always beat an employer’s provision, I’d have thought.
I fully get what you’re saying, and the reasons, but guess is that death is maybe a lower risk scenario than critical illness, so removing the death bit wouldn’t save that much? (We got our life assurance through the mortgage provider to minimise the crushing and tedious grimness of going through the getting quotes process this time, cos the last time we searched, the providers were much of a muchness anyway.)