Hello Thorsten,
the Browser Tab title problem is going to be solved if you update to SAP UI Addon 2.0.
After we updated to 2.0 the Browserstab titles are being desplayed correctly. With Webynpro and UI5 Apps.
But it still overwrites the Backgroundpicture and uses the default ui5 version if u use "SAPUI5.Component=..." in the LPD_CUST.
I hope it helps you.