So I qualify myself saying I've not done scottish winter climbing, I don't know the circumstances of that, but I have put on in a shop all the Paramo jackets and I've done a lot of Lakes hiking in all seasons with a Velez and done a lot of cycling in my Velez, so you will get some advice, but not all from experience.
The Velez has a chest zip and side-vents plus arms which velcro above the elbow, and the pump-liner does a good job if rain comes in through the neck area, if you have a wicking layer underneath, to dry you out. You can open up quite a bit.
The Velez is good for all outdoor situations in cool weather. Each person has a different upper threshold, mine I found was around 13C. The shortness of the jacket only calls for appropriate trousers, e.g. cascada.
The high chest pocket means if you're raising your legs high up, there isn't much weight to lift around the lower part, so its good for climbing or cycling. Folks who simply walk don't tend to notice length as much hence Aspira, Cascada, etc jackets.
The Velez's side-vents make it good to use with a backpack,because you pass the straps through the side-vents and buckle inside, so you get good traction on your hip bones without riding up the jacket.
I never sensed any coolness of the Velez vs the other jackets, I think they are all the same thickness/insulation, and to be honest you'd want good waterproof trousers regardless of the jacket, apart from those fringe like showers you'd want some thigh protection and not put on the trousers.
I'd say the Velez fully zipped-up takes you with a thin baselayer to say around the 2c-5c lower limit, below that you need to be active (moving) or add something underneath, or something ontop. I did walk around Chicago onces in strong winds at -20c and I'd say the Velez would be good with fleece underneath and a belay ontop (e.g. Torres gilet).
The long-term wear of the new thinner material, time will tell! However, Paramo is more repairable than other makes, the outer layer is not your waterproof layer, and they are good on warranty repairs. You are more likely to suffer from loss of breathability or waterproof from the other jacket's fabrics like eVent, Goretex, etc. i.e. you are more likely to get the most value in terms of winters used from Paramo Analogy than any other waterproof layer.