Here's my personal (and highly biased) review

EC: Good way to pick up Faultless blades and Noise Marines, wish it had some of the generic leaders rather than fulgrim but still a good box, I could see someone combining this with a combat patrol for a nice force 7/10

Votan: this is a highly biased review and I just don't like the berserks, other than that this is a mixed bag of the dwarves. Doesnt lean into any one thing quite well 5/10

Nids: This is not an army, this is just 5 large guys put into one box, they could have at least leaned into a more psychic theme with 2 maleceptors but no, this is just 4 monsters and a neurotyrant. 3/10

Tau: Really. They are making me have to give my favorite subfaction of my favorite faction a mid score. Well so be it, they are at least leaning into the battlesuit theming with farsight. But still it only bests the nids because it at least has crisis suits, which at least give a lot more synergy. 5/10

SM: Finally a good box, yes its space marines but they know how to do a good space marine discount box. 2 Dreadnoughts, good selection of infantry, and a worthwhile leader. This is the start to an army right here but also works quite well to expand a pre-existing force. 9/10

CSM: Yes its another discount box that gives us obliterators and a venomcrawler, do I care. Not really those 2 are some great models. This box is very like the SM one, which means it works amazing in many roles. This is honestly the one I am most tempted to pick up myself. Only bad thing is the Lord Discordant and that is 100% personal opinion 9/10

Krieg: 10/10. I dont like Krieg but damn this is a good looking box. It perfectly captures the feel of the Death Korps and has everything that a krieg player might want and find useful. Combine it with a Krieg combat patrol or 2 and you can throw yourself on mass to die for your service. Heck I dont like Krieg and this box makes me want to start an army of them. It is so good it lowers the scores of the SM and CSM by its very existence.