Yes, I agree with Babe14. Firstly about Alfie running round the Square just missing Kat. It's a very old tired and well-worn cliche in Eastenders now and they ought to give that scenario a long long rest.
Secondly, yes, I don't see anything wrong with Chrissie getting together with Jake. After what Den did to her, Zoe etc., why should she go in to life-long mourning. Sharon should recognise that Chrissie has to get on with her life and if Jake makes her happy that's up to her. I can't imagine, if it had been Chrissie who had been killed, that Den would have remained celibate for very long!