Just a pedantic point, the Force test prepares no one for war. We spend months working people up before we send them into SDAs (Special Duty Areas). The Force test is a physical fitness test. While part of it is not the sum total.
As for the UoS and all that jazz, the sticking point is finding a practical application for the different stages of the Force test. And unless you are a green weenie chances are not much of it applies to you and it's just another nauseating task we have to complete every year.
Hence why I would suggest for the RCN some form of Fireman's test. It has excellent practical application and, as you and I can both attest, bunker gear, Dragger, a charged firehose will test anyone's fitness. Throw in some CASEVAC and ladder climbs and you have yourself a pretty sweet little fitness test, that's also providing some reasonable applications that will help to express to th participant that this is not just an exercise in nuisance it's also part of being a sailor.
I've no experience in th RCAF so I won't pretend to comment on what could work for them. But having time as a green weenie myself and a navy puke; and purple I can safely express that the Force test is pointless. So pointless even the Army went and put their own Army spin on it.
The FORCE test means that every member is minimally prepared for the physical efforts required of members in war. Which is the entire point of UoS as well. It's not to prepare all members to participate in a dismounted patrol in the mountains, or build a bridge. When we do WUPS for a mission we train is specific tasks for the mission, not general physical wellness.
As for practical application of the FORCE test in an RCN environment, that's pretty easy if you think past the use of sandbags. The whole point of the sandbags is to have a cheap, easy to manage, single standard for the entire CAF. I think people get hung up on the physical actions, and forget what the actions are testing. The test simply proves that you can move yourself, and a moderate amount of weight, around sufficiently well do the basic tasks expected of a CAF member on tasking/deployment.
As for the elements of the test itself:
20m Rushes: Force protection is a part of RCN life, if members can't move from cover to cover in a reasonable fashion how can they be expected to defend the ship or the jetty the ship is alongside? Just because we haven't had an active shooter at an RCN ship yet does not mean it can't happen. It's a larger stretch than the other tests, but this test is also more of the general fitness test as well.
Sandbag lift: Storing ship, storing ammo, moving stores inside the ship, or moving AFFF cans during a fire.
Intermittent Loaded Shuttles: Moving AFFF in a fire, moving around in bunker gear with Drager, or moving charged hoses while in bunker gear.
Sandbag Drag: Moving a wounded sailor during a fire, or other emergency.
I don't see how adding bunker gear, and using hoses would make the test more valid. We have other evolutions for testing firefighting skills. Conflating RCN with just firefighting is also not helpful, as there are lots of shore based and purple jobs that RCN members are expected to do. The CAF tends to lean a bit too JArmy, but that doesn't mean all things CAF are JArmy.