Yes, LCH is easier to use for picking colors than other CIELAB color spaces. To try an LCH color picker, you can use http://davidjohnstone.net/pages/lch-lab-colour-gradient-pick... (as linked in another comment).

You can also use the better-implemented color picker for the HSLuv color space at http://www.hsluv.org/. HSLuv is just like LCH except that it stretches the saturated colors for each hue so that any saturation coordinate represents a valid color, unlike LCH’s chroma coordinate. The downside is that the color’s chroma (colorfulness) can change when you drag the hue slider.

> HSLuv is just like LCH

To be clear, HSLuv, is based on CIELCHuv, the cylindrical transformation of CIELUV [0]; the LCH in David Johnstone's colour picker is CIELCHab, the cylindrical transformation of CIELAB [1].

Of course, that doesn't contradict your comment about the pros and cons of HSLuv's "saturation" component.

[0] https://en.wikipedia.org/wiki/CIELUV

[1] https://en.wikipedia.org/wiki/CIELAB_color_space

“LCH” is just the same as CIELAB, but in polar coordinates.

Prefer CIELAB to CIELUV for this type of use.