I've posted enough stories on here about couples who now wished they had applied for citizenship when they had the chance, they left the UK to live somewhere else, and for what ever reason wanted to come back to the UK, and the Non EU partner had to apply for a settlement visa again, but the UK partner couldn't meet the financial requirement..

its a warning to all, do it asap and be truly free from immigration problems forever

no brainer Steve get it done, you don't know whats around the corner