And, actually, I wanted to add, this is what I said on the "assessing Soa" post about this way of assessing the Force and why it's valid and true to Lucas' original vision and all that:
...feats are comparable. While nothing matches Grand Master Luke's feats, or similarly overpowered ones, I think the force bonds and projection we see in the Last Jedi is comparable to Legends-level powers.
So, in the Original Trilogy we're told that it's possible to lift giant things with the force because size doesn't matter in the Force. But it's still more difficult to lift objects which are larger. Why? Well, in order to lift something using the force, (it's implied by Yoda in Empire strikes back but states it directly in the canon novel Weapon of a Jedi), one must feel the force around them and the object they wish the move, and "swim" through the force and become the force, which the object is part of. Then, it's as simple as moving a part of your body, since all things are bound together by the force, like your body is bound to your mind. Which is also why becoming One with Force causes you to become so powerful. You are connected to all things, and are all living things embodied now. It would also explain why being completely one with the force means you can no longer affect the physical world, because you are no longer connected to the physical world in any way, just the essense of life. But that's retconned in both the legends and new new canon, so whatever, I guess. But I haven't answered the question of why it's harder to lift bigger things yet. So, if you have to wrap your focus around an entire object in order to lift it, you have to feel the force all around it and you. If the object is small, like a stone, then you can focus on the force around it easily. If the object is the size of an X-Wing, it takes considerably more practice and concentration and meditation. This also explains why it's harder to move things which are farther away. You have to sense the force that surrounds something WAY far away, yourself, thereby making you need to focus on the force between you and that object, so it would be much harder to lift something up that's several meters away, than something that's only inches away. This is why Vader strangling Ozzel from so far away is an incredible display of power, which it has been acknowledged as being in many books. He can reach so far through the force that he can kill people which are far enough away from him that they can't be seen through the naked eye. And Sidious strangling Count Dooku from half-way across the galaxy in TCW is even more impressive. So basically, when using the force, size and distance matter, but weight doesn't. So, lifting a cotton ball which spans 10 feet by 10 feet would be just as difficult as lifting a lead block that's 10 feet by 10 feet. And a tiny piece of a neutron star would be just as easy to lift as a rock that same size, regardless of density.
So when Luke creates that projection from Achch-To to Crait, it spans LIGHTYEARS. If he can effectively become so in tune with the force that he can do that, he should be able to concentrate on the force around Dreadnaughts no problem. He should be ripping them out of the Sky. And that's not even the end of it. Snoke creates that bond between Rey and Kylo. This bond requires the kind of energy which would kill Rey. It's also a strong enough bond to teleport actual matter (when Kylo touches the rainwater from Ahch-to), make Kylo and Rey forget their actual surroundings (When Rey fires that blaster off in the hut), and make them see the surroundings of the others (the Ben Swolo scene). It's also powerful enough to make them touch each other, and teleport their own essense and part of their physical body over lightyears. That kind of power is close to GM Luke's feat with pinning Caedus to that chair. And it rivals the most powerful of legends characters, so yeah, maybe Canon = Legends, now.