Is that good to release arcane shortly before new cap comes?

[csyui]

Mysterious pet and Arcane weapons soonest. Lovecrafting obviously in
Feb. Client next, and very much affected by apple approval cycles.
Expansion (with level cap raise) thereafter.

Finally, all of this can and will change

- g

From the above quote, I assume arcane weapons should be released next week. Then lovecrafting event will take place during 2/14.
After that, probably one week or two, new client will launch (in early March). And new cap (Lv51) come in April-ish.

Does that mean our lv46 characters can only use arcane weapon as the most powerful season-long weapons for about two months? Then we have to look for Lv51 mythic or legendary weapons.
That is really a short life span for lv46 arcane items, even though you can say that

Your hard earned arcanes will certainly still be some of the most powerful in the game and will serve you well even after the new weapons are released.