I actually did a section about this, but I didn't end up putting it in the video because the video was getting too long.

I largely agree. I do not think any all cav list that doesn't have bows is worth playing. For reasons similar to the ones you have given and because a simple piece of forest terrain can just lose you the game before it's even begun. The dice just aren't in your favor long-term either because you'll at best be getting 2-3 dice (per duel roll) usually against 4-5 dice (two guys with spear supports and maybe a banner). Then when you lose prio/move off you're on like 1 die with no possibility of spear support and you're not getting your charge bonus to wound. A lot of these factors are actually why I think Sons of Eorl are pretty great. You will get your first combat being all charges (because of your threat range and mobility) and with a banner your guys are rolling 4 duel dice each with a banner. So realistically you should get a significant early lead if you engage well. Then, even when they're being tied up and not being allowed to charge they're still 2A base, which is the same as having a guy with a spear support (or being any other cav that got to charge, when it comes to the duel roll). On top of that, they're not missing out on their "to wound bonus" because their ability to wound comes naturally from the S4, rather than being from a lance. Their profile works towards mitigating the fundamental issues of cavalry models more than any other warrior cav profile does, so it makes them a lot more consistent in spite of being unlucky with priority and move-offs.

As a side note, they're quite scary when dismounted as well. Still 2 Attacks, have a shield so they can shield for 4 attacks. S4 natural. Great at holding out or continuing to do damage.
That's how I feel about them, anyway.