Having used both BDW8 Security and BDIS 2014 and now 2015 for a while I much prefer BDW8 Security.
The two main reasons I prefer BDW8 Security.
1. Is uses noticeably less memory
2. It is easier to configure and maintain than BD 2015. I would not like to see it updated to look like BD 2015 products nor to include the bells and whistles in the BD 2015 products
I have posted several times what a great product I think BDW8 Security is. Therefore if it is updated to be W10 compatible I would prefer to see zero changes to its design and features. Just make it W10 compatible
The above comments are based upons having used BDW8 Security for over two years and BDIS for over a year.