On most DA revolvers including Ruger, S&W, Taurus, Rossi, and Charter Arms, a slight amount of rotational play in the cylinder even at full lockup (hammer down, trigger held fully rearward) is normal and completely acceptable. While excessive rotational play is indicative of pretty severe problems, it would almost certainly be accompanied by other signs of excessive wear to the ratchet, cylinder stop, and cylinder stop notches. Likewise, a gun with excessive rotational play would also likely have pretty severe timing issues up to and including poor accuracy and shaving lead/bullet jacket on the edges of the forcing cone when fired.
The only real exception to the above is older Colt DA revolvers like the Police Positive, Detective Special, Diamondback, Python, Official Police, and Original Trooper (not the later Trooper Mk. III or Mk. V). These guns use a double pawl hand for a "tight" lockup. As such, these guns should have zero perceptible rotational play at full lockup though a slight amount when the action is at rest or the hammer cocked but trigger not pulled would still be normal.
As to the trigger pull, a DA pull of 10lbs or more is fairly common. While they can be made substantially lighter, one has to be careful when doing so because making the DA trigger too light often requires modification/replacement of springs that can cause misfires. Most experienced revolver aficionados aren't all that concerned with the weight of the DA trigger so long as it isn't excessively heavy but rather with its smoothness. I personally would much rather have a smooth 12lb trigger than a rough or gritty 6lb trigger.
