For a ship that is on screen for a grand total of 10 seconds, the SI doesn't DESERVE a larger vehicle.
I'd file this under the same type of response as "That figure didn't do anything so he doesn't deserve more than 6 points of articulation" kind of answer.
But that's a fair argument, I think.....Hell, I love it when ANY figure is given extra articulation, but I far prefer my Luke's, Obi Wan's, clones and stormies to have the extra goods rather than a Cantina alien.
By the same token, I'm thrilled we got "large" toys in the form of the Gunship and ARC-170 (even though those ships aren't really much more important than the Infiltrator.)
I certainly don't fault you for your opinions...

, but I think getting the SI is terrific and I never would have expected ANY toy for a ship this insignificant (yet cool-looking), so I'm pleased as punch to get it. And that's not just because it exists at all - had they done a crappy job, I would pass. But they didn't. Scale aside, this looks neat and I can't wait.
As to the Falcon - do we need a resculpt? Well, that's a fair question. But the original Falcon was a thing of beauty back in 1978 and it still is to this day. Are the proportions wonky? Sure, a bit. But it's a great TOY - not a model. It has scads of lovely features that are great for kids......back in the day, I was amazed at how much play value this thing had and I still marvel at it. It does literally everything the Falcon in the movie did (albeit in a silly, "kiddie" kind of way.)
Would I like to see another Falcon....? Sure, why not? Hasbro has come a long way, I'm sure they'd dazzle us with a modern version. And yet, I could go my entire life without getting one and never give it a second thought. Don't really see the urgency, despite the importance and iconic nature of the toy. The original still holds up.
Perhaps your thinking more like an adult about these kinds of things (not a criticism, mind you, just an observation.) As toys, though, the Falcon, Slave I (both versions), and even the Sith Infiltrator (to name just a few) more than bring the goods. Bravo, team!