[Let us go to the staging screen (level select) with a button, rather than hitting back/closing windows]

Totally agree with this. Would save so much time.

[Loot Corpse?]

I'm not 100% sure if this is the right place to post this, but earlier today I was playing with a low level friend in one of the Mercury missions. I went through a vent, and next to a couple of lockers there was a Grineer corpse on the ground. When I approached the corpse, I was prompted to press X. The message said "[X] Loot Corpse". Upon pressing X repeatedly, nothing happened, but the message faded and reappeared each time. I'm wondering if I stumbled upon something unfinished, or if something cool was supposed to happen upon looting the corpse. Either way, just thought I would post and see if anybody else encountered something similar.

[Inventory Navigation]

Not something extremely important, just thought I would throw this out there. After collecting around eight pages or so of mods, it becomes rather annoying trying to find the ones you want to sell. I would suggest setting up tabs for the inventory to allow quick navigation between different mod types. For example, a tab for rifle mods, a tab for warframe mods, etc. Just a minor suggestion that would add a bit of convenience.

[Weapon Effects on the environment]

Very cool idea! I think it would lend a lot to the immersion factor this game somewhat lacks at the moment. I agree that something like this should be implemented, but maybe it should be put on the backburner for a while until DE finishes working out the game mechanics.

[aesthetic, do not lose the way of good taste]

Honestly, the elemental effects have been kind of a turn-off for me. They manifest prominently around the hilt, while the few pieces along the blade are scattered and few. I agree that they need to be fixed, and your ideas seem pretty solid. It's not a very big issue for me, but it does eat away at the back of my mind when I'm playing. I must say though, I am really impressed so far with the CBT. Keep up the good work Digital Extremes!

[Lobby, Guilds, and PVP]

So there I was, unloading the dishwasher, when out of nowhere I had the most wonderful epiphany. What if Warframe was the first coop shooter to implement a well structured and in depth guild system? My thoughts started trailling, and before I could get control of myself I was imagining not only large scale guild battles, but also guild halls and a lobby system ripped out of a game like PSO. There would be an area for the market/arsenal/foundry, an area that opened up the solar system map for accepting pve missions, a counter for duels/pvp, and of course, a zone that led to your guild hall. Partying would take place in this hub world, and groups would be able to set out on missions from the solar map. I'm sure I'm going to get a lot of hate for posting this, but keep in mind that I don't expect ANY of this to actually be seriously considered and/or implemented into the game, I just felt like sharing some random ideas I had that would, in my personal opinion, make this game much more appealing. Keep in mind that I am a huge fan of PvP oriented games. On a side note, something that i think should definately be added into Warframe would be a little more customization just to make your character feel more unique. I understand that the premise of Warframe is, in fact, the warframes. I'm not asking for Halo style spartan armor customization. But if you could throw some ornamental items onto your character's back or torso, I think that would be a really nice way to make people feel more unique, as opposed to just being a palette swap of the other two guys in the EXCALIBUR frame. Maybe have an emblem on the chest or something. A guild emblem even. :3 Anyway, thanks for reading! Let's keep this civil.