I can understand the desire to simplify for newer players. But why not have a "suggested" build as a template to work for. Each trait line could have a build. Not mandated or required...but a suggestion that could highlight skills and deeds as folks are leveling up .
Simplifying game mechanics for new players is fine. I don't see how trees would do that. The real problem is that new players have trouble understanding the game mechanics jargon: "-10% all skill inductions" isn't intuitive language for most new players, and some LI legacy language is especially confusing. Also, the fact that some minuses are good, and some pluses are bad is confusing. "-15% attack duration" is a benefit; it should be "+15% attack speed." The same goes for skill inductions. Add to this a lack of players being able to easily see what they would lose/gain when equipping a new item, and it's no wonder that new players feel that LOTRO is "difficult." I don't see how trees will make the game friendlier if the confusing mechanics language stays the same. I'm not opposed to it otherwise, so long as it's fun.