My level 3 guy, actually level 4 now is going to be an acrobat. He's wearing some light +2 armor i pulled out of a chest. I crafted him a 10% alacrity item. Yes, he is a 36 point build. Yes, he has tomes but they mostly don't apply at that level. He is a strength build, a half orc, so his dex and intelligence are low.
What is really different about the lammania assassin vs the one on live? You are talking about korthos. Those feats that lost the melee power? You don't have them yet. When i started playing, before the ac system change, the general rule was that everything hit you, every time, because it did. AC did about nothing without heavy investment. There was no dodge as we now know it. Now ac is amazing at low levels. Just putting on armor is going to get you missed half the time at level. When i started there was no such thing as prr or mrr. You took all the damage, all the time.
Most of the difference for me is in perception. When i started, i remember when things started hitting me in melee for more than 30 damage, i was shocked by it. Literally freaked out. Now, after playing through epic elites, where the damage is much higher, those things are still hitting me for about the same amount of damage ( i play a lot of low prr characters) it just doesn't freak me out any more. It's something that comes from experience, and some power creep in the game mechanics, which they are rightly trying to tone down some. The difference the past lives i have make is just not that much.