I have just download the mythic saga client as in the website.
Frankly speaking it is not a true client. It is only another browser-like application, and we are still going to download the text, music, rewards, character pack each time we connect.
The whole thing is only 1.37mb.
Why not pack all the data in? Just download the character details like level and items, other stuffs like music or text can stay with the pack, and reduce the hassle of downloading everything, which is the purpose of making the client in the first place.
By the way, packing all the maps in the client would be a good idea as well, together with the mobs. So that everytime you enter a map there is no need to load the map and the monster again, then the game will be more smooth.