''So far the only enchatments we have seen is simple numerical values, and percentages, which feels boring. BG2 had weapons that had more varied effects, from (bleeding,stun,life stealing,slow) on hit, to passive buffs and protections(mind shield,negative plane Protection, haste etc.)while equiped, to active abilities and spells.''
This isn't true. If you look at the enchantment list, you will see that many of the things you mentioned are in the list (e.g. Wounding, Stunning, Draining are all in the weapon list -- only "slow" from your list isn't) and more. Though there aren't currently recipes for them, there are also Spellbind effects for weapons and armor (allow you to cast specific spells while the item is equipped) and Spell Holding for shields (go off when the holder is hit with a Crit). While the core list of effects are likely to remain accessible via the enchantment system, many of the Spellbind and Spell Holding effects are more likely to remain unique properties.
We also have to build up to a BG2 level of power. PoE is not in the same "power band" as BG2. It's more comparable to somewhere between BG and IWD.
''Strategic possibilities? Well that's pretty tough since anyone can use anything in this game. But I suppose we can come up with a list of just cool magic items.
- Sword of hobbling - a weapon that causes the hobble state on the target. Of course, the minute you give me such a weapon, I'm going to have my rogue equip it so that I can reap all the Rogue class's benefits against Hobbled targets lol. (ack! that almost qualifies as degenerate gameplay/exploit. Forget that pipe dream then. Sawyer won't allow it)''
There is already a property available in the Backer Beta called Overbearing that inflicts Prone, which also allows your rogue to gain Sneak Attack bonuses. The Stunning property would also do that, though either can be combined with Vicious to gain additional bonus damage.