Its funny you mention Bosmer, because I was just talking with a friend the other day about what I feel is better in PvP based on traits alone, and I'm now of the opinion its Bosmer. Don't get me wrong, I like the Khajit and the better criticals are nice, but most people have very strong resistance to criticals out there. Meanwhile, the Bosmer has a very nice resistance to poison and disease, which are actually quite common forms of attack or secondary effect in pvp. The Stamina Regeneration while not huge is still beneficial so I wouldn't scoff at it. If you're playing the role of an archer, I really think Bosmer Templar isn't bad. I've pondered the concept as well since I already have plenty enough Nightblades as it is. This is assuming I were to make more characters.

While its isn't huge, magnum shot might be nice to have on one of your bars, just to get some breakaway speed from people. Reflective light additionally would be good to keep them off you. If you're on a keep firing down at enemies, you definitely want the alliance passive that boosts the range of your ranged attacks for your snipes and any aoe attacks that will hit them and their sieges. Personally, I'd also probably put Radiant Aura in the mix, so that I could keep firing stamina abilities even more.

While you can't cloak and escape, you can spit out heals, cleanses, and wear a nice Blazing Shield. Ranged attacks are definitely very useful in pvp, I wouldn't give up hope. You just don't want to be stuck fighting solo very much as a general rule, because its very easy for a team of people to run up and slaughter you. Take a look at some of the Set Gear as well. I'd particularly look at things that involve Weapon power if you want your bow attacks to hit harder. The real balance is in how you weave your stamina and magicka attacks. Try out a few different sets that are more stamina and magicka heavy, and then get acclimated to each style. I've been doing this myself to get a better sense of what I can do with my class.

Finally, we do know that spellcrafting is going to have invisibility based on what the Devs have said before. I wouldn't lose hope, there are still a lot of neat options for your Bosmer. If you like, message me in game some time.