No for 1 if each run is small enough. No to 2. The LED UCL thread is sufficiently generic to cover both low voltage and line voltage (direct wire) LEDs. Here is a link that might be useful: LED UCL continuation

The generic 1.5 should be fine for your average SINGLE hunter fan.

Trying to interperet what you did. Removed old switch which controlled both and installed new switch which controls both separately? New switch must be limiting the light output. I am guessing new switch should be swapped out for two separate switches, use the old switch for the fan and a new standard switch for the light (or LED capable dimmer if you want that). Requires a old work double gang box and cut the drywall for it to fit.

I'm in the same boat. AFAIK, there is no combo fan/light switch that is capable of dimming LED bulbs AND is also wifi-controllable for use with Google Home Mini and Amazon Alexa. For that, you'll have to wait a year or two, but there will certainly be some products soon because home automation is really taking off. Right now, you don't have many options. You shouldn't use a regular dimmer switch to control a fan, and there are only two fan/light combo controls that are capable of dimming LED bulbs (which of course need to be dimmable). Neither has wifi (or other smart technology). I decided not to wait for a wifi-enabled fan/light controls because one of the sliders on one of my existing wall controls broke and I needed a new control right away. I was happy just to be able to find one that works with LEDs finally. I have regular IR remotes for my two bedroom fans, so being able to voice-control them isn't a priority. As long as I have a physical remote, I'm OK. (I hate getting out of bed to adjust the fan.) My office fan doesn't have a remote, but it doesn't seem necessary, and it's probably better for me not to have one so I'll get out of my chair once in a while. The two fan/light controls that work with LEDs are: Lutron Maestro Fanlight control that works with LEDs. This is a single pole control and CANNOT be used with fans that have DC motors (found in newer, better quality fans). More colors than the LeGrand. About $55 at HomeDepot. One year warranty LeGrand Fan/Light control that works with LEDs. This one is both single pole and three-pole, and has a dehummer feature that is supposed to eliminate fan motor hum as well as a memory to remember your settings if you lose power. There's an optional light bar that can be installed below the switches if you want a nightlight. About $33 at Lowes. (Be sure to get the right model because LeGrand has an older model that looks identical but doesn't work with LEDs.) Lifetime warranty I bought the LeGrand control and like it much better than my old Hunter control. (The Lutron came out a little later so I didn't consider it, but the LeGrand was probably the better choice for me.) The controls have a nice feel, although the switches make an audible click that some people might not like in a bedroom. (Mine is in my office.) Also, I had to replace the electrical box with a bigger one. (I don't know if this would have been necessary with the Lutron. It's not just a question of the physical size of the control but of how many wires come into the box. Since the Lutron is single-pole only, it might be a bit smaller.) If you're really determined to have a fan/light than you can control with the Google Home Assistant or with Alexa, companies are beginning to come out with fans (some with lights) that have wifi built in. One wifi-enabled fan that I've read about is Haiku (model name) by Big Ass Fans (company name). They're pretty pricey, though ($1500 for the base fan, plus the cost of the light module, the wall and/or remote. I assume the app you'd need to control it with Google Mini is free.) To sum it up, if you're not in a rush, wait a bit and you'll have better choices.