Favored enemy doesn't really work as a general feature and has bad implications. You have a bonus that either doesn't function or provides little benefit. Hardly special. Furthermore, the DM should never feel obligated to shoehorn their encounters because of one particular class feature or...
Battlemaster's Weapon
Master's Blade
Farbond Spellblade
Blade of the eldritch knight
Boltshard Crossbow
Foe-seeking Bow
Architect's Staff
Symbol of the Warpriest
Tome of Summoning
Rod of Repair
Rod of Ulban
Rod of Corruption
Master's Wand of Static Shock (I love the idea of these...
Surprising lack of necrotic support. Poison support isn't much better--just a couple "once per day tack some on." Still no cold ki focus for vamps/assassins/monks. I liked the Channel Divinities and the disciple feats for the most part. The boons generally have ok properties but some of them...
Encounter powers were introduced in 3.5, although if you're counting stuff like "do X during the first round" feats it's at least as old as Dirty Fighting. The psionic classes (Monk aside) already tried an encounterless power setup; it's an iffy tradeoff. The e-class tend you to give you more...
Characters get the vast majority of their damage from items and features. Attack and defense are much the same. The feat system in 3E misfired because they were small patches trying to compensate for huge gaps in competency. Not a big fan of the CP system either as the point disparity...
You went for a slightly bigger light blade instead of the light blades you can already use. That isn't a weapon type issue. Ideally I want to have a suitably hurty main weapon and a secondary with some type of useful power. Implements tend to have a wider variety of utility, but frankly...
Most of the things you'd want to have are uncommon or rare, and they give more gold/residuum if you get rid of them. It's a pretty hollow distinction. Agile is a. more restrictive b. available to light armor users now via Ringmail.
The thing about flail expertise is that it is easier/quicker to obtain than the previous methods of "I knock things down a lot." Flail Strike is also very strong.
1 AC is the difference between scale and plate. Hide wearers with a good secondary and this now have the best AC you can get...
I am a bit surprised you're not starting with the Sorcerer-King Pact, even if only for Mindbite Scorn. Vestige Pact, at least starting out can also be helpful for a sort of arcane sniper (Zutwa boosts your Prime Shot)