Used to run Albatross bars on my LHT. I tried to use some bar ends mounted at the bend for a while. Wasn't great. Instead I just slid some handlebar grips up to the bend. It gave me another hand positions. Slightly more aero. Not really as comfortable as the main position, but when you're biking for hours, it feels good to change your grip at times.

Now I'm running some Crazy Bars. The bullhorns resemble how I used to try and set up bar ends on the the albatross bars, but they work a little better. The main position remains the most comfortable, but the bullhorns come in handy on long rides. They're somewhat aero, or at least as much as I've found to be necessary.

I didn't convert a bike from one to the other. But I did buy my LHT knowing that I wouldn't be putting drop bars on it. I didn't worry too much about the reach, figuring the swept back bars would make the reach shorter, and they did. When you do the conversion, you will likely need a longer stem, not shorter. Remember that on drop bars, your hands are either even with the stem when you're up top, or ahead of the stem when you're in the drops. With a swept back bar, the furthest position you can grab is going to be even with the stem, but the main position will be before the stem.