Questions about Melira Pod

[Humfrie]

Hi guys, I'm going to play Melira Pod at some PTQs this seasons and I need some tips. I posted my list below. I have some questions:
1) Im having doubts about Shriekmaw main deck. Would Restoration Angel or Phyrexian Metamorph be better?
2) I have Dismember in the sideboard, should they be path to exiles?
3) Could you guys tell me what do side out and what to side in for these matchups: Twin, UWR control, Jund, The Mirror.
Thanks in advance!

23 LANDS
4 Verdant Catacombs
4 Misty Rainforest
3 Razorverge Thicket
3 Forest
2 Overgrown Tomb
2 Temple Garden
2 Gavony Township
1 Woodland Cemetery
1 Godless Shrine
1 Swamp

29 CREATURES
4 Kitchen Finks
4 Birds of Paradise
3 Noble Hierarch
2 Voice of Resurgence
2 Murderous Redcap
1 Melira, Sylvok Outcast
1 Viscera Seer
1 Archangel of Thune
1 Spike feeder
1 Orzhov Pontiff
1 Spellskite
1 Reveillark
1 Ranger of Eos
1 Qasali Pridemage
1 Linvala, Keeper of Silence
1 Eternal witness
1 Scavenging ooze
1 Wall of Roots
1 Shriekmaw

4 INSTANTS and SORCERIES
2 Chord of Calling
2 Abrupt Decay

4 OTHER SPELLS
4 Birthing Pod

15 SIDEBOARD
4x Thoughtseize
1x Burrenton Forge-Tender
1x Thrun, the Last Troll
1x Kataki, War’s Sage
1x Sin Collector
1x Slaughter Pact
2x Dismember
1x Harmonic Sliver
1x Aven Mindcensor
2x Choke

[Arsenal]

1.) Shriekmaw is pretty boss and I wouldn't cut him, but silver bullet creatures are largely personal/meta calls. For example, I've seen some lists opting to run their 1-of Orzhov Pontiff in the sideboard whereas I personally run him in the maindeck. I suppose if your meta is infested with Affinity, Boggle, GBx, UWR Control, then it may make sense to ditch Shriekmaw as he's mostly dead in those matchups.

2.) I personally run 2 Path to Exile, 1 Slaughter Pact and 0 Dismember in my sideboard. I can't think of too many scenarios where Dismember would be strictly better than Path to Exile and we already inflict a lot of life loss on ourselves, so paying a potential 4 life towards Dismember (to make it cost the same as Path to Exile) is an unattractive proposition.

3.) This is a reasonable guide that you can use to start getting the feel of sideboarding with Melira Pod. While I don't agree 100% with everything suggested, it's a lot better than most of the Melira Pod sideboarding primers floating out there: http://www.starcitygames.com/article/28031_Melira-Pod-In-Valencia-Richmond.html