Are they any actual advantages to removing bloatware?

I know rooting can help you remove bloat from your device, and many custom roms let you choose what bloat you want but it got my thinking.
For a not very technical, low end user with lots of storage space left, could removing bloat actually make a positive change to how they use their phone like less crashing or more battery life or something? Would it be worth installing a custom ROM like Omega on a less technical family members phone and removing bloat from their phone, would they notice a difference?
Also, does anyone know if omega does anything like that, like I've heard from one person that the omega kernel extends their battery life?