Is there a possibility of updating some of the textures?

[Riardon]

i doubt my computer will be able to run the game with hq texture, but the fact to offer the choice is more important than all.

I don't know what machine you have but I can tell you that a HQ texture pack will not severely harm the performance (except if you have a rly rly weak machine that struggles even with the lowest current settings and your VGA is many years old). There will be also ppl who will prefer the HQ textures over other settings and compensate their settings. That's the good about the freedom of choice on PC with the graphic settings. You can turn on the ones you prefer mostly and turn off others to get more performance. The choice never harmed anyone.