When 1.6 was announced I was very exciting about declared mounted combat and archery. But it comes live and what I see? You can't cast spells and therefore use summoned weapons in combat!
This is VERY frustrating to people who used to use summoned weapons!
Please add ability to use magic on horse!

Any comments please? Will I be able to play my character the way I like in future?

In future, possibly, but considering that this is pretty much free DLC you should be lucky that you can even swing your sword on a horse.