I think any trigger safety is a bad idea. It can only be as good as the engagement of sear to hammer or cocking-piece, which can wear. Break-open shotguns manage pretty well with them, but they are often used either alone or with strict rules of etiquette in operation, and they don't need as strong a mainspring as the hard rifle primer.
I would consider half-cock good enough for most hammer rifles, such as Winchesters. The half-cock is more substantial than the notoriously vulnerable one of the single-action Colts, and not even the intellectual classes
fan Winchesters. I do find the current cross-bolt safety very irksome, because it is so unlike what I use on any other firearm, except the Winchester 1200 I used to have as my getting-wet shotgun. If they felt they needed something besides half-cock, a lever safety would surely have been better. The lever safety on the German ordnance revolvers of 1879 onwards simply holds the hammer on half-cock, neither up nor down, till it is depressed in a way far more natural than the crossbolt.
Here the lever safety simply engages with the hammer when it is down, as in my double-action .32 by Di Pietro of Palermo.
Rifle cocking-piece safeties are generally very good, if a scope doesn't make them difficult to operate. Both the trigger and side-swing cocking-piece safety of my Brno Model 2 .22, bought for £30 ten shillings and sixpence by lunching cheap when I was a student in 1970, are both unacknowledged homage to the Winchester Model 70. It is a thoroughly effective safety, and I can strip and reassemble the bolt in seconds with a pencil. But it violates one rule of safeties I consider important. It works in the opposite direction to most others I am used to, forward to safe and backward to shoot. There is surely an opening for anyone to make an after-market part which does it the other way about.
I agree about the M1917 and P14 Enfield safeties, which anyone would be foolish to replace. They are reliable and well-placed. When I fitted the Dayton=Traister trigger and speedlock kit to my P14, I found that the safety would no longer engage. It should engage with a tiny curved slot in the new cocking-piece, and I had to use a diamond burr to remove a tiny amount of metal from the lip of that slot, until the safety operated without the little click the original made, and still lifted the cocking-piece the tiny amount that is necessary for safety.
This last is very important with any cocking-piece or hammer safety. If the safety doesn't lift the cocking-piece, and the trigger is pulled, there cocking-piece falls a perhaps invisible amount to be held by the safety. Then there won't be room for the sear or trigger to move back into place. The rifle lurks in ambush, ready to fire as soon as the safety is removed.
You wouldn't be pointing it at anybody at that moment, would you? No, nobody would. But relying on safety alone is no better than relying on trigger alone.