I never regretted buying Armistice Bastion Pass.
Apart from the Standard Pass convenience of having all the vendors located in one small area, this gives us 2 other very valuable bonuses.
Weekends features duelers across almost every timezone from NA to OCX to SEA (not sure about EU).
There are no shortage of duelers.
Even if there are occasional empty times, a simple map chat calling for duels usually draws a couple to the Arena.
If you're a roamer/duelist enthusiast and are able to afford it, do buy it when it next becomes available.
Saving up to buy it is also very worthwhile IMO.
CD -> TC -> Mag -> GOM -> AR -> JQ