Short vs Long brake pads (with v-brakes) on road bike rims at high speed
You should not have a problem.

In fact it should be easier to set the toe as well as the alignment. Assuming the block widths are about the same, you should see better stopping power as well as cooling.

I go long, esp. cause I'm +90kg and enjoy speed.

Shudder and "grabbiness" are typical toe issues. If you follow the pad instructions or any of the hundreds of guides available online, you'll get real good at setting the toe and get the most out of them.

It is the most common issue I fix for friends who's "bikes don't work".