Thank you Diego for working with us to make the timeline experience more streamlined.
I will attempt to make a video of the issue i'm seeing, but here's a write up at least.
1) add a sprite to a time line
2) goto frame 0
3) the timeline bar is red (not in edit mode), so i can't add any keyframes
4) turn on edit mode, and now the "add keyframes button" is an option of the right click menu - but selecting it doesn't any any x/y values etc to the timeline
5)turning off edit mode (leaves only the visiblilty/lock/checkmark options red (the keyframe area is no longer red) - but still cant add keyframes at frame 0
6) the only way i can add a keyframe at frame 0, is to now turn on edit mode, and move the object from where it started (which i dont want to do, i want it to stay where it currently is in my environment - then right click and add keyframe. (now i have a keyframe on frame 0
7) now i goto a new keyframe (the red line is missing btw, probably still hiding on frame 0) and move the sprite to a new location and pick "add keyframe", but now the box pops back to the very original location for frame 0 from that offset location i had to move it to to be able to key frame 0
So what's happened here, is since i couldnt set a keyframe on frame 0 to begin with, then i had to offset the object to get it to add a keyframe, but that keyframe isnt where i moved the object to, its back where it didn't want to save it. so now when i scrub this two new keyframes, its moving from the very first location, and not where i visually see the sprite. but i have 2 keyframes at least now.
8) so then i scrub my animation and it looks likes it working now, with 2 keyframes etc. And so i turn off edit mode, and my sprite is no longer working at all, but there's keyframes on the timeline but nothing is happening when i scrub (it no longer moves. the only way to see it move is now to hit the play button.
this is why the experience is really confusing.