Tactician mode is interesting. I definitely go for Honour after few patches.
I have just picked up a knight and a Inquisitor to give it a try. Out of box, no particular modification. (which is a waste)
I was wandering around and get 6th level. I was wiped only 3 times at all.
I watched few youtube letsplay on Tactial, most people surrender the play. Or switch to lower difficulty.
Also I have find an topic on Steam like: " I suck in game, so can you make tactical easy enough for me?"
Thats it, it is hard. It ment to be hard. And its done great way, not simply add HP as usual dumb game, but more emey, new nemy, smarter enemys. It is for completest and skill professors.

Tactical is great. I think that this will give DOS:EE long, long popularity for RPG positive fans.
Play on standard first then for next run choose other clasess and higher diff, the game now has a great replay value.