Guild Wars 2

Well, i just want to know if it’s possible to work on a system thet gives the chance to switch build instead of reset traits runes and sigils and choose from 3 equip in inventory…
I mean, gw2 structure should give advantages to skilled players, and I think that know what kind of build use in PVX difference the “zerg player” from the “skilled player”..

PVE- For example (Warrior lvl 80, meta builds for easy examples):

-I wanna do a COF fast run, so I use a dps build with gs/axe-axe and do my run
-After the cof, i wanna do SE, so i switch to a 20-0-20-0-30 build with axe-shield/gs
-Once SE it’s done i wanna do twilight arbor, so i switch to hambow build

Same on PvP (War 80, meta builds):

-I have on condi war build, and when i go in arena i must face a team with 3 guardian, so what can I do?

A: Hope that they are all dps guardian (even if the meditation removes condition fast too)
B: Reroll to other class
C: And if I only enjoy playing war? Should I create 5 war with different builds?
With this system I just switch to another war build and go on..

I can made examples even for WvW but the fact is the same, give us chance to choose faster what build use!
Obviously this system could have some rules, like:

Pve: can’t change build once in an istance/ can’t change in combat
WvW: can’t change in combat
PvP: can change build until the 10 sec countdown it’s over

Hope you all read and discuss on them, would be nice from both players and devs to give an opinion..