がよさそうだ

it seems better to…

→ が
phrase Rare #41,573
it seems better to… Usually follows ほうが, as in verb + ほうがよさそうだ, to give a tentative suggestion or say what seems like the better choice.
JA: 今日は早く寝たほうがよさそうだ。
EN: It seems better to go to bed early today.

私たちは待った方がよさそうだ。

It looks like we should wait.

睡眠をとったほうがよさそうだ。

You should probably get some sleep.

すぐに出かけるほうがよさそうだ。

We’d better leave right away.