Some directions given by Ja'Basska are a bit misleading and, optionally, could be slightly more detailed.

Sarvayn Ancestral tomb directions

They are given by Ja'Basska in the following terms :

The Tomb can be found directly north of the town of Aimrah. Go now.

In Morrowind, usually, "directly north" means you can literally press W and stumble upon the front door.

Not that such simplicity is a goal, but given where the tomb is in regard to Aimrah (not directly north), better directions could be :

The Tomb lies close to Aimrah, somewhere to the north, just next to Hlorandus fortress. (Or, more precise : [...], just to the west of Hlorandus fortress.)

Or, in another style :

The Tomb lies close to Aimrah. Take the road north out of the town and go west at the first crossroads. It's a bit further, you can't miss it.

Not a native english speaker, so phrasing may have to be adapted.

At the very least, I think the "directly" in "directly north" should not appear. North of Aimrah allows one to guess they'll have to search for the tomb, whereas directly implies one can look at the map and trace a direct line north.

Llaran Farm

Basically, same goes for Llaran Farm directions, in the next quest.

They are stated as follows :

The Llaran farm is directly south of Mundrethi plantation, and north of Oran plantation.

Technically, it is precisely south of Mundrethi plantation indeed. The issue is that Mundrethi plantation is not a waypoint on the map, even when you have visited it.
Mundrethi plantation, Slave's market, is though, but this one is not directly north of Llaran farm.

So all in all, it's just a bit confusing.

Maybe the directions could be adapted like so :

The Llaran farm is between Mundrethi and Oran plantations, northwest of Rethil farm.

Or, in another style :

Llaran farm is on the road north of Oran plantation. Just take the road out of the plantation and the farm will be on your right.

Cheers.