I wonder how good your original batteries were.

After looking at your video, and having flown a well set up Reactor Bipe, I can say that the EP version I flew was faster and climbed equal to or better than what I see in your video.

Typically if an EP plane feels "underpowered" or seems to be a dog, then the power system is not properly configured, or the batteries are sagging under load.

I had a couple of EP planes where I also though them underpowered... after changing out the packs for ones with a higher "C" rating, the difference was night and day.

I also fly several .25 - .30 sized planes with electric motors in them, and if anything their performance compares to a similiarly sized .32 plane with a .46LA engine, which is not bad at all!