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The slow move thing happens when the parts are trying to ease back into position sometimes. I'd try this type of rigging for the arm, which will keep the forearm and hand straight. Usually draggables are best as single handles at the extreme edge of what you want to drag.
And yes, independence can get tricky. My general feeling is to always start without independence and only add it in if absolutely necessary. We recommend not to add independence to the head and body groups. If a particular pose isn't working as is, then maybe it's worth recreating it as a triggered part swap.
So for example, if sitting with these current legs doesn't feel like it's working, you could have a "legs" group with standing and sitting groups inside it (all non-independent probably), and have it so standing is the default and sitting shows up when you press S or something. If the animation was fast enough, you could probably get away with posing the draggable legs in standing and swapping to the sitting position at the end. I haven't seen too many examples of people doing this yet with CH though, so you're charting some new territory!
Thanks very much for taking the time to look into that. I appreciate the awesome advise and screenshot. For anyone dealing with similar characters, something you did with my rig was to simplify the bone structure and joints. I have definitely noticed that simplicity in rigging works best for artwork like this. I am going to try out some of this and try your swapping advise. If it works out, I will post the result! Thank you so much!
Mostly good news here. I tried rigging the arm as you had suggested. This solved most of the problems. There is still one thing happening. When I pose him, there is still a prominent "adjustment" which happens, though the "Sliding" is gone. The pose starts on the first frame with no easing, but it still moves into place.
I found a work around. Please let me know if there is a better way to overcome the issue for future reference. The easiest solution I can come up with is to give the animation some leader frames, so the artwork has time to adjust. Thoughts? This does not fix any funky twerks that may happen within the animation, so I am finding that minimum distance or intensity on position movement is a good approach.
As for the sitting issue, swapping is going to work out best for me in the long run. However, for this particular instance, I simply added a fixed pin just above the waste and the movements that his body makes began to look more natural. In essence, the same way you show people how to fix the standing character in the OG rigging tutorial.
Taking warp independence off of the body and head groups was also a huge pointer that immediately improved my quality of life.
Thanks for the help.
Glad you figured things out! Yes, I almost always do a few extra seconds at the beginning to prepare things, which I trim out later (usually in After Effects). There's a current issue/bug I think with the zero frame state "bumping" to the first frame, I've seen that before as well but I think it's on our radar. Thanks for sharing the tips!
Thanks for the feedback. Since you mentioned the potential bug issue with the zero point, thought I'd mention one last thing I noticed; in my case, the adjustments always happen clockwise, no matter how I position things. Thought that was interesting.