Installed the build on L720 and its not as fast and stable as 8.1.. Yes it is for 1gb with quad core phones but old phones are running w10 bad.. System apps still take time to load(shows 'loading'), phone freezes sometimes, store freezes sometimes, glance not available, phone stutters while using with music playing in background.. Is it going to be the same with official release or we'll get 1-2 builds/small updates before official?? Or should i start saving to buy a new WP?