More Sanctuary areas from existing assets

[voidctrl]

My impression is that (Elite) Sanctuary Onslaught is one of the most played modes in Warframe, simply for the convenience of leveling Warframes and gear quickly. However the pool of areas is very limited, players will always see the same areas over and over again. Adding more existing tiles would benefit players from high to low mastery ranks, make this heavily frequented mode less tedious and, most importantly, seems like a manageable effort to complete because no new 3D models need to be built. No new tilesets, just get more use out of the existing assets.

A good example would be larger cave areas from Plains of Eidolon, Orb Vallis and Cambion Drift (both "natural" and Orokin Ruin), maybe some areas that were tied to quests (e.g. Inaros temple or the dark ship from Harrow's quest) and would otherwise not be re-used, or maybe even the interior of a Railjack.

In short: DE, please put more of the tiles you already have into (E)SO.