I am a mid-range casual player with 745 CPs who mostly solo, including normal and veteran dungeons, and who do not do PvP at all. After reading patch notes and discussions on the PTS server, I was scared that my chars would be send to where they were a year ago in terms of power when the CP 2.0 and other planned changes go live. I therefore checked it out on the PTS with my main, magicka dragonknight, and well, it happened. Even though the tool-tip damage of my skills was roughly the same on the live and PTS, the damage output went down, because I had lower penetration, critical rating and critical damage. This is very frustrating, because it is likely I will not be able to do the content I am able to do on live now.
The problem would be partly alleviated if we were allowed to spend our CPs wherever we wanted to. The rule that we have to spend 1/3 of our CPs in each skill tree was justifiable in CP 1.0, because there was something useful for each playstyle in each constellation, but it is not true in CP 2.0 where this rule is too restrictive for some playstyles. If completely free CP allocation was a problem, even ability to spend a half of CPs in one tree would help a lot.
As a solo player I need both offensive and defensive perks. I can get them in CP 1.0, because they are in different trees, but I cannot get them in CP 2.0, because the most important ones are slottable perks in the blue tree and there is not enough slots for them. This problem could be alleviated by adding at least two slots for the blue constellation.
Last, but not least, the design of gating some perks by other perks makes more or less sense in the warfare and fitness constellations, but is quite ridiculous in the craft constellation in some cases. For instance, I was forced to decrease the cost of wayshrine travelling in order to get the perk I really wanted. At the same time the decrease in the cost was so negligible that it did not have any practical effect apart from sucking my CPs away. Even better example is forcing people to invest into crafting inspiration even though they have all crafts maxed.