LACP Timeout Fast vs. Slow

I've got 2 Juniper Switches with ae's over DSL. The bandwidth Isn't great and the runs are somewhat shaky.

We get tail drops semi-occasionally because there's no QoS on the line (not going to change, at this time).

The LACP timers are set to Fast (1 sec), on both ends.

We get LACP timeouts on one of the Switches, presumably because it's failing to receive PDUs in-time (and that's presumably because of the tail-dropping)

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Pros/Cons to setting these timers to Slow as an alternate route to alleviating this?

(My thought is that it would at least give the switch a bigger window of time before screaming that the line is down.)