You Know When A Knight Reaches an Elevator That His/Hers name(the one with the knight's head shot at the top left) has a "waiting at lift" indicator what i'm suggesting is that for the people with slow computer who takes long time to load a level is that while in a party if they are still loading a level their would be an indicator for it.
Please Support This Idea i was once kicked of a party due to taking a long time to load and got killed while alone and used up all my mist energy(i was new at the time) also why is the gloming wildwoods takes a longer time to load than other level(on my slow pc a usual level takes a less than 2 minutes but for the wildwoods it takes more than 5 most of the time)
First off: When your knight is loading, the weapon does not show, and I believe the shield is mounted on your back.
You can probably reduce your loading times by bumping down your graphics settings and/or resolution. If you have a REALLY old computer, it may not be able to run SK well, which means you should avoid the Roarmulus Twins when you hit T2, but I digress... Aside from that, see if upgrading your computer is possible.
Unless everyone you're playing with is totally new or just flat out dumb, they should realize soon enough that if someone's weapon isn't showing and they're not moving, they have not finished loading. The main issue people have is that at least for an average level, they can complete it in probably 5-10 minutes. Waiting for one person to load for 5 minutes is pretty much delaying the whole team a level, and many people don't like that (including me, but I usually go solo rather than kick).
So yeah, -1 from me for this suggestion since there's already a clear indicator of people loading. My advice, try to get T2 ready ASAP, that way you'll deal with derps a bit less often.