You asked
Is the leica super vario elmarit sl 14 24mm f 2 8 asph worth it?
Here is what the site says about that.
From Leica Super-Vario-Elmarit-SL 14-24mm f/2.8 ASPH: Leica Super-Vario-Elmarit-SL 14-24mm f/2.8 ASPH: A zoom lens by Leica for Full frame cameras, 14-24mm f/2.8. Specs - Maker: Leica - Focal length: 14-24mm (zoom) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (L-Mount): as marked, 14-24mm. - On APS-C (L-Mount): like 21-36mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. ...
From Sensor sizes: Is full frame worth it?: For low light, events, and portraits with very shallow depth of field, yes. For travel, street, wildlife on a budget, and most hobby photography, a good APS-C camera with good lenses is enough, and you'll carry it more. Lenses and light matter more than the last stop of sensor performance.
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