Its all about job security
What you have to ask yourself is this. If your company goes bust, where you going to go. With TP command hours ? With Jet FO hours ? Which would make it easier for you to get another job ?
It also depends on what you want to do in life. Fly a TP for the rest of it ? Nothing wrong with that, but you have to think that you may have 30 years work ahead of you and although you may be happy working where you are now, where do you go if and when they go bust or you lose your job.
Some advice for you, but this is my own opinion. Get the jet time, go to Emirates, get a rating that will keep you in a job for life and then after a few years in the middle east, if you're not happy move on. Simple.
BA do not give a !!!! if you have command on a turbo prop. The last lots of advertisements from BA wanted you to have jet time over 50 tonnes or be rated on an aircraft they operate.
In the UK, you having TP time means nothing. easyJet, Monarch, Thomas Cook, BA, Thomson will look at those who have jet hours before TP command and Ryanair will never take anyone but a pay as you go as long as there is pay as you go's willing to do it which is good if its your first job.
I would say, get the jet time, get to Emirates after you have 2000 hours jet or Qatar after you have 1000 hours jet and then get a type rating that will give you a long lasting career.
Take the TP command and be a TP pilot for a long time ?