It may look like a small addition, but I think it's important. Here's why:
"upsteem" is closer to the name of the site, it's not voteit.com, it's steemit.com
"upsteem" will make it easier for people to understand what's happening when they are clicking that arrow - it's not like they're electing the content in some electoral college, but they are driving away steem from the rewards pool
since voting is such a common activity, changing the name to be closer to the site name will help with brand awareness
it will make the site stand apart from other sites which are using appreciation input and create an identity (just like "Like" is almost a Facebook patent)
it will give people a nice, personal touch: the self-esteem goes up
If you agree, let me know in the comments. If you don't agree, let me know in the comments as well.
I'm a serial entrepreneur, blogger and ultrarunner. You can find me mainly on my blog at Dragos Roua where I write about productivity, business, relationships and running. Here on Steemit you may stay updated by following me @dragosroua.